The SEIKO x Bocchi the Rock! collaboration watch costs ¥59,400, tax included, and is limited to 300 pieces. U-TREASURE is taking reservations from October 7, 2026, at 12:00 through November 27, 2026, at 23:59, Japan time, through its online shop and Ikebukuro and Shinsaibashi concept stores. The serial number is assigned at random, not chosen by the buyer. [U-TREASURE]
Price, reservation dates, and where to order
U-TREASURE’s announced price is ¥59,400 including tax. Reservations are scheduled to open October 7, 2026, at 12:00 and close November 27, 2026, at 23:59, with the release presenting the dates in Japanese local context. Reservation channels are U-TREASURE’s online shop and its concept stores in Ikebukuro and Shinsaibashi. The announcement does not establish worldwide availability or international shipping. [U-TREASURE]
There is a date discrepancy in U-TREASURE’s earlier September 10 announcement: its opening paragraph says reservations start October 17, while its product details give October 7. The more recent, detailed October 7 release states October 7 as the start date. [September 10 announcement] [October 7 announcement]
How the watch puts Kessoku Band on the dial
The black dial takes its cue from a vinyl record, with a guitar-pick-shaped marker at 12 o’clock bearing the Kessoku Band logo. At 6 o’clock, the subdial brings in the image colors of Hitori Gotoh, Nijika Ijichi, Ryo Yamada, and Ikuyo Kita, alongside “BOCCHI THE ROCK!” lettering. The crown also carries the band logo.
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- AUTOMATIC WITH MANUAL WINDING MOVEMENT: powered by the reliable 4R36 Caliber, these Seiko automatic watches for men combine automatic and manual winding capabilities.
- DURABLE UTILITY: this watch is water-resistant to 10 bar, and boasts a stainless steel watch case with hard black coating and comfy black nylon strap, ensuring it lives on your wrist as a robust yet stylish sports watch
- BLACK DIAL WITH BLACK BEZEL: this men's watch features a striking black dial with a black bezel, adding a touch of cool sophistication to any outfit
- DAY/DATE DISPLAY: the day and date are both on the watch face, helping you stay organised and on top of your schedule
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The caseback features the anime logo, the individual serial number, and a “Shimokitazawa Tsuchinoko” Easter egg. U-TREASURE notes that the caseback may not align upright because of the watch’s construction. A dedicated box inspired by the series is included. [U-TREASURE]
Published specifications
U-TREASURE describes the watch as a chronograph, but specifies a Japanese-made quartz movement: it is battery-powered, not a mechanical or automatic watch. The figures below are the company’s published specifications, not independent test results. [U-TREASURE]
Quick Recap
Best Value
- AUTOMATIC WITH MANUAL WINDING MOVEMENT: powered by the reliable 4R36 Caliber, these Seiko automatic watches for men combine automatic and manual winding capabilities.
- DURABLE UTILITY: this watch is water-resistant to 10 bar, and boasts a stainless steel watch case with comfy beige nylon strap, ensuring it lives on your wrist as a robust yet stylish sports watch
- BLACK DIAL: this men's watch features a black dial and beige luminous dial indicator hands and numerals for easy visibility
- DAY/DATE DISPLAY: the day and date are both on the watch face, helping you stay organised and on top of your schedule
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Rank #4
- WATER-RESISTANT: these water-resistant men's dive watches are ISO scuba-approved to depths of 200 meters
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable 43.8mm stainless steel watch case and bracelet.
- LUMIBRITE DISPLAY: this men's automatic watch features a highly-legible display with LumiBrite hands and markers
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
Rank #3
- BURGUNDY DIAL: this men's automatic watch features a burgundy deep, pressed pattern with a gloss finish and rose gold stainless steel watch case
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL & LEATHER: features a durable rose gold-finish stainless steel watch case paired with a brown leather watch band
- WATER-RESISTANT: these men's wrist watches are water-resistant down to 50 meters
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
Rank #2
- STUNNING BLUE DIAL: this automatic men's watch features a deep blue, pressed pattern and gloss finish surrounded by a stainless steel watch case
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable stainless steel watch case and bracelet with see through caseback
- WATER-RESISTANT: these men's wrist watches are water-resistant down to 50 meters
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
| Specification | Announced detail |
|---|---|
| Case and bracelet | Stainless steel |
| Case dimensions | 47.0 mm tall × 39.8 mm wide; approximately 11.7 mm thick |
| Movement | Japanese-made quartz |
| Glass | Curved Hardlex |
| Water resistance | 10 bar, described as enhanced everyday water resistance |
| Stated wrist circumference | Approximately 14.5–19.5 cm |
| Accuracy | Average monthly accuracy of ±15 seconds |
| Battery life | Approximately three years |
| Clasp | Three-fold push-button clasp |
| Origin and warranty | Made in Japan; three-year warranty from purchase |
What to consider before reserving
- Check the fit: Compare your wrist circumference with the stated 14.5–19.5 cm range and consider the 47.0 mm case height as well as its width.
- Know the movement: The published specification is quartz, with an approximately three-year battery life; the chronograph label does not mean it is mechanical.
- Read the water-resistance claim narrowly: U-TREASURE describes 10 bar as enhanced everyday resistance. The announcement does not provide independent test results or a more specific activity-use guide.
- Expect overt franchise details: Logos, character image colors, and series references are visible design features, balanced by a black record-inspired dial.
- Use the named reservation channels: The announcement identifies U-TREASURE’s shop and two Japanese concept stores; it does not verify marketplace listings or overseas delivery.
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.
