All About Casio: The Most Searched Questions (And Their Answers)

Is Casio a good watch brand or is it low-end?

Good question. And the short answer is: it depends on which Casio we're talking about. Because Casio isn't just one brand; it's an ecosystem. And within that ecosystem, there are €20 watches and several hundred euro watches, and even some over €3,000 in their luxury MR-G and Oceanus lines.

Generally speaking, Casio is an excellent brand. It's one of the few companies that has managed to democratize technology, offering reliable, durable products with unbeatable value for money. Since its founding in 1946, the company has proven that innovation and affordability are not mutually exclusive.

Is it low-end? Some collections are indeed entry-level (like the iconic F-91W or the Vintage line). But the same brand has lines like high-end G-Shock (MT-G, MR-G) and Oceanus, which compete in terms of finish and technology with much more expensive brands. An MR-G, for example, can cost over €3,000 and is crafted from titanium with artisanal finishes.

Where are Casio watches made? Are they really Japanese?

Yes, Casio is a Japanese brand. Its headquarters are still in Tokyo, where the Kashio brothers founded the company in 1946. However, manufacturing has nuances.

Casio has factories in Japan (mainly in Yamagata and Kofu prefectures) and also abroad (China, Thailand, Malaysia). The key is to read the dial or the case back:

• "Made in Japan": manufactured in Japan. It's the most coveted by collectors and is usually found in high-end models like MR-G, Oceanus, and some Premium G-Shocks.
• "Japan Movement": the movement is Japanese, but final assembly may have been done outside Japan. It remains a high-quality product.
• "Made in China" or "Made in Thailand": mass-production models like the F-91W or many standard G-Shocks. This does not indicate lower quality, but rather a production strategy to maintain accessible prices.

Anecdote: The legendary F-91W, the best-selling watch in history, is currently manufactured in China and Thailand. But its design, engineering, and quality control are 100% Japanese. That hasn't stopped it from being considered one of the best-designed objects of the 20th century.

What does "Casio" mean? Why that name?

The name is simple but has history. "Casio" comes from the surname of its founders: the Kashio brothers. Tadao Kashio, the eldest of the four brothers, founded a small workshop in Mitaka, Tokyo, in 1946, which he called Kashio Seisakujo (Kashio Workshop).

When the company grew and diversified, they adopted the name "Casio Computer Co., Ltd." in 1957, coinciding with the launch of the world's first compact calculator, the Model 14-A. The choice of name was an adaptation to the international market: "Kashio" sounded too Japanese, so they simplified it to "Casio", easier to pronounce and remember worldwide.

Trivia: Before becoming the electronics giant we know today, Tadao Kashio's first big success was the yubiwa pipe, a ring that held a cigarette, allowing you to smoke it to the end without burning your fingers. It was a hit in post-war Japan and provided the capital to develop the first calculator.

What does "G-Shock" mean and why is it so famous?

G-Shock stands for "Gravity Shock". It was born in 1983 from the obsession of a Casio engineer named Kikuo Ibe. Ibe was so frustrated when he saw his father's watch (a very cherished gift) break that he set himself an obsessive goal: to create a watch that would never, ever break.

He came up with the "Triple 10": 10-meter drop, 10 bars of water resistance, 10 years of battery life. After over 200 failed prototypes, Ibe and his team created a revolutionary concept: instead of firmly attaching the movement to the case, they let it "float" suspended within a urethane structure. This way, shocks were absorbed and the movement was protected.

In 1983, the G-Shock DW-5000C was born. It was ugly, square, and huge. But it was indestructible. A US television commercial showed a hockey player slamming a G-Shock against a wall, and the watch kept running. The success was global. In August 2017, the G-Shock family reached 100 million units sold since its launch.

Today, G-Shock is much more than a watch: it's a cultural icon. It has been worn by military personnel, musicians, surfers, and CEOs alike. The collection ranges from the classic DW-5600 to the sophisticated titanium MR-G, including the popular GA-2100, nicknamed "CasiOak" for its resemblance to the Audemars Piguet Royal Oak.

What does "Vintage" mean in Casio watches?

The Casio Vintage collection is a journey to the past. It was officially launched in 2017 as a line that brings the sleek, distinctive design of 70s, 80s, and 90s watches into the present.

They are not exact replicas, but updated reissues with modern technology while maintaining the aesthetic that made the brand famous. The collection is divided into four sub-families:

• ICONIC: The most recognizable models, like the A168WA (stainless steel) or the A158W (gold-tone).
• MINI: Smaller, more streamlined versions, designed for slender wrists.
• ROUND: Models with round cases, inspired by analog designs from the era.
• EDGY: Bolder, more provocative designs inspired by the looks of the 2000s.

Trivia: The most iconic model in the Vintage line is the A168WA-1, which has maintained the same design since 2001 and remains one of the best-selling watches worldwide. Its battery lasts up to 7 years.

What is the most famous Casio watch ever?

There are several candidates, but if there's one that deserves the title of "most famous", it's the Casio F-91W.

Launched in 1989, the F-91W is the best-selling watch in history. With its minimalist design, low cost (around €20-€30), and extreme reliability, it has become a cult object. It's the watch we've all owned, the one that keeps running after ten years on the same battery, the one that doesn't care about fashion or social class.

But there are other equally iconic candidates:

• G-Shock DW-5600 (1983): The first G-Shock, with its unmistakable square shape. It's a favorite among purists.
• Casio Calculator CA-53W (1980): The calculator watch worn on Marty McFly's wrist in Back to the Future. A pop culture icon.
• A168WA (2001): The stainless steel one with a blue dial, one of the best-sellers in the Vintage line.
• G-Shock GA-2100 (2019): Nicknamed "CasiOak", it revolutionized the brand with its sleek, angular design, attracting a new generation.

Anecdote: The F-91W is so famous that it has been the subject of design studies. The Museum of Modern Art (MoMA) in New York included it in its permanent collection as an example of perfect functional design.

Are Casio watches quartz or automatic?

The vast majority of Casio watches are quartz. And it's no coincidence: Casio was one of the brands that drove the quartz revolution in the 70s and 80s, manufacturing some of the world's first digital watches.

Casio Quartz Watches: They are the heart of the brand. From the most basic F-91W to the most advanced G-Shock, all run on quartz movements. This guarantees exceptional precision (typically ±15 seconds per month) and battery life that can reach up to 10 years on some models.

Are there automatic Casios? The answer is no, until 2025, when the Casio Edifice Automatic was presented. Until this release, Casio had never mass-produced automatic watches. However, in the 90s, there were some rare models with automatic movements (like some "Auto" G-Shocks, which combined quartz with a rotor that generated electricity). But today, Casio's catalog is 100% quartz (or hybrid technology like Tough Solar).

Which is better? If you're looking for maximum accuracy, durability, and low maintenance, Casio quartz is unbeatable. You don't have to wind it, you don't have to constantly adjust it, and the battery lasts for years. If you value mechanics and the smooth sweep of the seconds hand, Casio might not be your brand. But if you want a watch that never fails, is tough, and requires no fuss, you're in the right place.

What is "Tough Solar" in Casio watches?

Tough Solar is Casio's solar charging technology. Present in many G-Shocks, Pro Treks, and Oceanus models, it allows the watch to be powered by any light source, whether sunlight or artificial light.

How does it work? A solar panel integrated into the dial converts light into electrical energy, which is stored in a long-lasting rechargeable battery. Once the battery is fully charged, the watch can run for months even in complete darkness.

Advantages:

• Forget about changing batteries. A Tough Solar watch can last decades with proper care.
• It's more eco-friendly: fewer discarded batteries.
• Ensures that advanced functions (like Bluetooth connectivity or GPS) have constant power.

Which models have Tough Solar? Most mid-range and high-end G-Shocks (like the GW-M5610 series, GA-B2100, or MT-G), all Pro Treks, and all Oceanus models. If you see a G-Shock with the word "Solar" or "Tough Solar", you'll never need to change its battery.

What does "Multiband 6" mean in Casio watches?

Multiband 6 is Casio's atomic wave radio synchronization system. It allows the watch to automatically adjust to the exact time by receiving radio signals from six stations around the world.

The stations are located in:

• Japan (two stations: one in Fukushima and one in Kyushu)
• China (Shangqiu)
• United States (Fort Collins, Colorado)
• United Kingdom (Anthorn)
• Germany (Mainflingen)

When the watch is within range of one of these stations, it receives the signal and automatically adjusts the time, date, and daylight saving time. Synchronization usually occurs at night when signals are clearer.

Is it necessary? If you travel frequently or simply want the most precise time possible (to the second), Multiband 6 is a marvel. If you live in an area without coverage or don't mind manually adjusting the time every few months, it's not essential. Many models combine Tough Solar with Multiband 6, creating the "ultimate watch" that never needs batteries or adjustments.

Do Casio watches increase in value?

Honest answer: most Casios are not a financial investment. They are mass-produced watches meant to be worn, not kept in a safe. But there are important exceptions.

Models that have increased in value:

• Limited edition G-Shocks: Some collaborations (with brands like Bape, fragment design, or luxury brands) have appreciated significantly. A 2010 G-Shock x Bape can sell today for 5-10 times its original price.
• Special edition G-Shock MR-G: Titanium MR-G models with artisanal finishes maintain or increase their value on the secondary market.
• Iconic vintage Casios: The original Casiotron from 1974, the F-100 from 1978, or the original DW-5000C from 1983 are highly sought after by collectors. A DW-5000C in good condition can exceed €1,000-€2,000.
• Original calculator watches: The CA-53W from the 80s, especially in good condition, has doubled in value.

General rule: Buy a Casio because you like it, because you want to wear it, and because you appreciate the engineering behind it. If it increases in value over time, great. But if you see it as an investment, there are brands with better track records. What is certain is that a well-cared-for Casio lasts for decades, and some models become classics over time.

What is the most expensive Casio in the world?

In Casio's current catalog, the record is held by the MR-G line, the highest range of G-Shock. The MR-G Frogman (diver's model) and the MR-G B2000 are around €3,000-€4,000 in their standard versions.

But limited editions can reach much higher prices. For example:

• The G-Shock MR-G "Hanami" (inspired by cherry blossom season) sold for about €4,500.
• The G-Shock MR-G "Kachi-iro" (with Japanese artisanal finishes) exceeded €4,000.

However, the absolute record goes to an Oceanus model, Casio's luxury line for the Japanese market. The Oceanus OCW-S5000 in its most exclusive version reaches €5,000.

Anecdote: There are unique Casio pieces that have been auctioned for astronomical figures, such as prototypes or watches that belonged to famous people. But in regular production, MR-G and Oceanus are the kings of Casio's high-end.

What is Casio's connection to calculators?

Casio's relationship with calculators is fundamental. In fact, Casio started as a calculator manufacturer, not a watchmaker.

In 1954, the Kashio brothers developed Japan's first electromechanical calculator. Their great innovation was the ten-key numeric keypad (0-9), which seems obvious today but was revolutionary at the time. In 1957, they launched the Model 14-A, the world's first compact all-electric calculator, and officially founded Casio Computer Co., Ltd.

Since then, Casio has been synonymous with calculators. Their scientific models (like the famous fx-991SP CW) are the most widely used by students and engineers worldwide. Today, Casio continues to manufacture all types of calculators: basic, scientific, graphing, and financial.

Trivia: Casio's experience with calculators was key to developing their watches. In 1980, they launched the C-80, the first watch with a built-in calculator, considered a "microcomputer for the wrist." It was a precursor to smartwatches, decades before the concept existed.

How do I find the manual for my Casio?

This is one of the most common mistakes. Many people search for the manual by the watch model (e.g., "GA-2100") and don't find clear results. The key is to search by the module number, not the model name.

How to find the module number? On the back of the case, inside a rectangle, there is a series of numbers. The module number is the one that appears after the word "MODULE" or "MOD". For example, "MODULE 3495". With that number, you can search for the manual on the official Casio website.

Direct link: You can access all Casio manuals in English from the official Casio support site. There you can search by module number or model.

Additional tip: If your Casio is a G-Shock, most models in the same family share the same adjustment system. Once you learn how to handle one, the others are very similar.

How do I change the time on a Casio G-Shock?

Although each model has its own specifics, most digital G-Shocks follow a similar procedure.

General steps:

1. Press and hold the top left button (labeled "A" or "ADJUST") for about 3-5 seconds until the hour digits start flashing.
2. Use the bottom left button ("B" or "MODE") to move through options: hour, minutes, seconds, year, month, day, 12/24h format, etc.
3. Use the top right button ("C" or "FORWARD") and bottom right button ("D" or "REVERSE") to adjust values up or down.
4. Press the top left button ("A") again to save changes and exit.

Important: On analog-digital models (with hands), sometimes you need to synchronize the hands with the digital display. If the hands are not aligned, you can use the hand adjustment function (usually accessible by holding the top left button, then the bottom left button).

For specific models, consult the manual for your module number.

How to properly clean a Casio watch?

Casio watches, especially G-Shocks, are designed to withstand anything. But if you want them to look good as well as last, it's important to clean them properly.

What NOT to do:

• NEVER open the watch to clean the inside. The case is sealed to ensure water resistance. Opening it can damage the gaskets and ruin the water resistance.
• Do not use harsh chemicals like solvents, alcohol, or bleach. They can damage the resin and finishes.

Recommended external cleaning:

1. Use a soft or medium-bristled toothbrush.
2. Wet the brush with water and mild soap (gentle hand soap).
3. Gently brush the case, strap, and buttons to remove accumulated dirt.
4. Rinse with clean water (do not submerge if it's not a diver model).
5. Dry with a soft cloth. To dry between the buttons, use a hair dryer on the lowest setting with cool or warm air, never hot.

For white resin straps: Discoloration is normal over time. You can try cleaning them with baking soda mixed with water to form a paste, but results are not always perfect. Some white straps darken irreversibly with sun exposure and use.

How to spot a fake Casio?

Casio counterfeits exist, especially of popular models like the G-Shock GA-2100 ("CasiOak"), the F-91W, and calculator watches. To avoid surprises, follow these rules:

Signs of authenticity:

• Price: If a €200 G-Shock costs €30, it's fake. Always. Casio has very tight prices, but not miraculous ones.
• Finishes: Authentic Casios have clean finishes, well-printed dials, and sharp logos. Counterfeits have blurry text, rough materials, and unresponsive buttons.
• Illumination: On models like the F-91W, the green LED light is characteristic. Counterfeits often have blue or white light.
• Sound: The beep of an authentic Casio has a characteristic tone. Counterfeits sound different.
• Case back: It should have the module number and manufacturing information engraved. If it's blank or poorly engraved, be suspicious.

Where to buy safely? Authorized dealers, trusted jewelry stores, and platforms like Amazon (sold by Amazon, not third parties) or specialized shops. On eBay, look for sellers with high reputation and years of history.

Anecdote: Casio is one of the most counterfeited brands in the world precisely because its watches are cheap and popular. However, counterfeiters rarely imitate high-end models like MR-G or Oceanus, because they are more complex to replicate. If you buy a cheap G-Shock from a street stall, assume it's fake.

Does Casio only make watches or other products?

Although the general public knows Casio for its watches, Casio Computer Co., Ltd. is a much broader technology conglomerate. Its obsession with innovation extends to multiple fields.

Calculators: This is the company's origin and remains a fundamental pillar. Casio scientific calculators (fx-991, fx-82) are the most widely used in schools and universities worldwide.

Musical instruments: In the 80s, Casio revolutionized the music world with the Casiotone, affordable electronic keyboards that brought music into homes. Casio keyboards (CT-S, CT-X) remain very popular today.

Projectors and office equipment: Casio manufactures high-quality projectors (with laser and LED technology) and point-of-sale systems (cash registers) for businesses.

Consumer electronics: In the past, Casio made all kinds of devices: electronic organizers, digital cameras (the famous Casio Exilim), and even pocket computers.

In summary: Casio is much more than watches. It is a company that has democratized technology on multiple fronts, from calculators to musical instruments, to the watches we wear on our wrists. The "House of Innovation" continues to apply its philosophy to any field requiring functionality and accessibility.