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Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →The G-SHOCK MR-G MRG-B2000JS-1A is an 800-piece worldwide limited edition built around a katana Casio commissioned for the MR-G line. Its recrystallized titanium bezel interprets the sword’s blade pattern, while a colored titanium-alloy band draws on the blue-shell lacquer of its scabbard. The watch launched in Japan in November 2024 at a listed suggested retail price of ¥1,100,000 including tax.
What is the Juryoku-Maru: San?
Juryoku-Maru: San is a katana commissioned by Casio as an inspiration for its MR-G watches. The blade was forged by master swordsmith Kamiyama Teruhira. Its scabbard, finished in an aogai blue-shell-lacquer style, was designed by Nomura Mamoru, the third-generation head of Kyoto-based SAGARADEN NOMURA, who works in lacquer and mother-of-pearl inlay techniques. The MRG-B2000JS-1A is the watch that translates those objects and crafts into a wristwatch.
![Casio GM-2100BB-1AJF [G-Shock (G-Shock) Metal Covered Series Blackout] Watch Imported from Japan Feb 2023 Model, Black, Mens, Black, Modern](https://m.media-amazon.com/images/I/41YV+AJKF6L._SL160_.jpg)
Casio announced the model on October 24, 2024, describing it as a worldwide limited edition of 800 pieces. Each watch has a serial number. That edition size describes the production run; it does not establish current stock or resale availability at any particular seller.
How the watch interprets the sword
A patterned titanium bezel
The bezel is made from recrystallized hybrid titanium, combining layers of pure titanium and Ti64. Casio says the material is compressed, cut, polished and recrystallized to create a pattern that evokes the temper pattern on the katana blade. Because the resulting pattern varies during manufacture, the bezel’s appearance differs from watch to watch.
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- Forged in stainless steel with rounded hairline finish, the strong bezel says super style all the way
- Super LED Light
- Shock Resistant
- Mineral Glass
A blue structural-color band
The band uses DAT55G titanium alloy treated to produce structural color inspired by the scabbard’s aogai shell-lacquer appearance. Casio says DAT55G is three times harder than pure titanium and that the band has a DLC coating for abrasion resistance. The color is a material treatment, not a shell-lacquer finish.
Hilt, blade and artisan details
The dial’s hishimaki-gara diamond pattern refers to the traditional wrapping seen on a sword hilt; the indexes take their cue from a blade’s curve. On the case back, Kamiyama hand-engraved 燦, the kanji used for “San,” on each individual watch. Casio says the engraving and finished appearance vary, making these craft details individual rather than identical across the run.
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- This model features a blue metallic vapor deposition dial that is complemented by a black band made of environmentally responsible bio-based resin
Specifications and launch context
| Detail | MRG-B2000JS-1A |
|---|---|
| Edition | 800 pieces worldwide, with serial numbers, according to Casio’s October 24, 2024 announcement |
| Japan release | November 2024 |
| Japan suggested retail price | ¥1,100,000 including tax, as listed by Casio Japan; a Japan-market launch reference, not a current global selling price |
| Dimensions | 54.7 × 49.8 × 16.9 mm, per Casio Japan |
| Weight | 154 g, per Casio Japan |
| Materials highlighted for this edition | Recrystallized hybrid titanium bezel; DAT55G titanium-alloy band |
| Functions listed by Casio | Solar-powered timekeeping, Bluetooth smartphone connectivity, radio-wave time calibration, LED light, shock resistance and 20-bar water resistance |
Feature descriptions can differ by regional product page, so check the Casio listing for the market where you are buying. Casio’s international product page describes the materials and design, its October 24, 2024 announcement establishes the limited-run framing, and its Japan page gives the dated release and local price and dimensions.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What makes this MR-G distinctive
The MRG-B2000JS-1A is more than a color variant: its defining choices map specific watch components to specific sword-making references. The bezel expresses the blade’s temper pattern through a variable recrystallized surface; the band refers to the scabbard through structural color; and the dial and case back carry hilt-inspired geometry and a hand-engraved character. The result is a limited MR-G whose individuality comes partly from variation in the finish, not just from its numbered production run.
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Rank #3
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- Choose from, sky blue, orange, or lime green, in addition to classic hues of navy and silver
Casio’s Japan price and November 2024 date should be treated as launch-market context. They do not indicate current stock, present-day street pricing, or availability outside Japan.
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Rank #4
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
