--- product_id: 11613324 title: "Oceanus Men’s Solar Radio-controlled Watch OCW-S100-1AJF" brand: "casio" price: "¥244356" currency: JPY in_stock: true reviews_count: 8 category: "Casio" url: https://www.desertcart.jp/products/11613324-oceanus-men-s-solar-radio-controlled-watch-ocw-s100-1ajf store_origin: JP region: Japan --- # Water resistant up to 100m Ultra-precise radio-controlled timekeeping Solar-powered, no battery hassle Oceanus Men’s Solar Radio-controlled Watch OCW-S100-1AJF **Brand:** casio **Price:** ¥244356 **Availability:** ✅ In Stock ## Summary > ☀️ Timeless precision meets sleek titanium style — never miss a second, never miss a moment. ## Quick Answers - **What is this?** Oceanus Men’s Solar Radio-controlled Watch OCW-S100-1AJF by casio - **How much does it cost?** ¥244356 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/11613324-oceanus-men-s-solar-radio-controlled-watch-ocw-s100-1ajf) ## Best For - casio enthusiasts ## Why This Product - Trusted casio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Solar Power:** Harnesses sunlight to keep ticking without battery changes or downtime. - • **Seamless Style Upgrade:** Polished Grand Seiko Zaratsu bezel and blue-hued sapphire crystal for a subtle, modern edge. - • **Set & Forget Precision:** Atomic time sync means your watch is never more than 1 second off—ever. - • **Travel-Ready Timekeeper:** Automatically adjusts for daylight saving, leap years, and global time zones with ease. - • **Light as Air, Tough as Titanium:** Super lightweight titanium case and band with scratch-resistant sapphire crystal. ## Overview The CASIO Oceanus OCW-S100-1AJF is a premium men’s solar-powered, radio-controlled watch featuring a lightweight titanium case and band, 100m water resistance, and a scratch-resistant sapphire crystal. Designed for professionals who demand precision and style, it automatically syncs with atomic clocks worldwide, adjusts for daylight saving and leap years, and offers a polished, modern aesthetic with a durable yet featherlight build. ## Description Buy CASIO Oceanus Men’s Solar Radio-controlled Watch OCW-S100-1AJF and other Wrist Watches at desertcart.com. Our wide selection is eligible for free shipping and free returns. Review: The GADA watch that I was looking for; Set and Forget; a marriage of art and science - I am a precision geek. From my collection of Swiss and Japanese automatics to the best of the quartz. A watch that NEVER needs batteries, NEVER needs to be recalibrated, NEVER needs adjustment for daylight saving time or leap years, NEVER needs service, NEVER more than 1-second off EVER. Tough, lightweight, beautiful with sparkling indices that wink at you in the daylight. There is no way for a camera to capture the real-life beauty. Super light, super strong titanium case and band, Grand Seiko Zaratsu polished bezel and case topped with 99.9% clear AV coated Sapphire Crystal with a Blue hue that compliments the indices and subtle logo. The titanium band is infinitely adjustable to precisely size to your wrist with a combination of half-links and 1 micro-adjust. It uses the pin-and-collar system with solid stainless-steel pins (not cotter pins) that provides the best strength and flexibility and, I believe, is the easiest to work with. The three hands point precisely at the markers from the factory and they, and the date wheel can be micro-adjusted separately if needed. Works both with and without an atomic signal. Finally, a classic dress, sport and tool watch that gives you time and NEVER takes it from you. CONS: Only available in Japan; you must buy from an importer. Review: Fantastic watch, and a real bargain! - I love Grand Seiko, and Citizen Chronomaster, but those watches are not in my budget. I never thought about Casio until reading reviews about this watch. I am glad I decided to give Casio a try, as this JDM watch is fantastic. Great design and finishing on the bracelet, watch face, and case. The comments by others about the difficulty of taking out links of the bracelet are valid ones. If you don’t have the proper tools and experience, do yourself a favor and take it to a quality jeweler that works on watches, and tell them that the watch has a bracelet with the pin and sleeve type links. The watch is easy to set up, and the second hand hits the marks on the watch face exactly. After the time synchs with the atomic clock, it is amazing to compare with the time on your cell phone, and see the minute change on your phone at the same time as the second hand on your watch hits the twelve o’clock position. It is amazing to set the time zone to Tokyo and watch tha watch hands and date change like magic. The titanium bracelet and cas are so light weight that you don’t even notice that you are wearing a watch. A great bargain on a top quality watch. The brand may not have the same status as some, but the watch itself lacks nothing compared to the others. Update: After 3 months, This watch has become my daily watch. My dozen or so other watches have been sidelined, and I am considering selling most of them. I often wear another dressier watch in the evening, but this watch is so versatile and comfortable, there is little reason to wear anything else. It has missed synchronizing only one night in 3 months, and that is when we were staying overnight in an RV, although it worked the other nights in the camper. I have picked up a few minor scratches and tiny scuffs, but the finish is much harder to scratch than stainless steel or regular titanium. For traveling, this is the only watch I bother bringing. For a one watch guy, this could be the one for you. This is a little larger diameter than I usually wear, even with a 7.5” wrist, but is is still modest in size, and with the light weight, you don’t even notice you are wearing a watch. ## Features - Titanium Band - Water Resistant - Tough Movement - Tough Solar - Imported ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0073B4KVO | | Additional Features | Water resistant | | Age Range Description | Adult | | Band Color | Silver | | Band Material Type | Titanium | | Band Width | 20 | | Bands | 1 | | Best Sellers Rank | #1,758,431 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #7,501 in Men's Wrist Watches | | Brand Name | CASIO | | Case Diameter | 41.5 millimeters | | Case Material Type | Titanium | | Case Thickness | 10.5 millimeters | | Clasp Type | Jewelry Clasp | | Clasp type | Jewelry Clasp | | Closure Type | Buckle | | Crystal | Crystal | | Customer Reviews | 4.7 out of 5 stars 188 Reviews | | Dial Color | Black | | Display | Analog | | Embellishment Feature | Crystal | | Face Style | Modern | | Item Weight | 90 g | | Manufacturer | CASIO | | Manufacturer Part Number | OCW-S100-1AJF | | Model Name | OCW-S100-1AJF | | Model Number | OCW-S100-1AJF | | Pattern | Solid | | Power Source | Solar Powered | | Series Number | 100 | | Shape | Round | | Sport Type | Walking | | Strap Type | Bracelet | | Style Name | Modern | | Unit Count | 1 Count | | Watch Movement Type | Quartz | | Water Resistance Depth | 100 meters | | Water Resistance Level | Water Resistant | ## Images ![Oceanus Men’s Solar Radio-controlled Watch OCW-S100-1AJF - Image 1](https://m.media-amazon.com/images/I/71-rrYynWPL.jpg) ## Questions & Answers **Q: Do i also have to pay import taxes and duties on this watch** A: Depends on the country. But Amazon ususally calculates the local import tax into the shipping fee. **Q: Does this watch have a global warranty?** A: Not as far as I know. **Q: Does this watch come with the Amazon two year warranty?** A: Yes **Q: Second hand dead on mark?** A: Dead on! ## Customer Reviews ### ⭐⭐⭐⭐⭐ The GADA watch that I was looking for; Set and Forget; a marriage of art and science *by B***K on April 5, 2026* I am a precision geek. From my collection of Swiss and Japanese automatics to the best of the quartz. A watch that NEVER needs batteries, NEVER needs to be recalibrated, NEVER needs adjustment for daylight saving time or leap years, NEVER needs service, NEVER more than 1-second off EVER. Tough, lightweight, beautiful with sparkling indices that wink at you in the daylight. There is no way for a camera to capture the real-life beauty. Super light, super strong titanium case and band, Grand Seiko Zaratsu polished bezel and case topped with 99.9% clear AV coated Sapphire Crystal with a Blue hue that compliments the indices and subtle logo. The titanium band is infinitely adjustable to precisely size to your wrist with a combination of half-links and 1 micro-adjust. It uses the pin-and-collar system with solid stainless-steel pins (not cotter pins) that provides the best strength and flexibility and, I believe, is the easiest to work with. The three hands point precisely at the markers from the factory and they, and the date wheel can be micro-adjusted separately if needed. Works both with and without an atomic signal. Finally, a classic dress, sport and tool watch that gives you time and NEVER takes it from you. CONS: Only available in Japan; you must buy from an importer. ### ⭐⭐⭐⭐⭐ Fantastic watch, and a real bargain! *by K***S on May 12, 2022* I love Grand Seiko, and Citizen Chronomaster, but those watches are not in my budget. I never thought about Casio until reading reviews about this watch. I am glad I decided to give Casio a try, as this JDM watch is fantastic. Great design and finishing on the bracelet, watch face, and case. The comments by others about the difficulty of taking out links of the bracelet are valid ones. If you don’t have the proper tools and experience, do yourself a favor and take it to a quality jeweler that works on watches, and tell them that the watch has a bracelet with the pin and sleeve type links. The watch is easy to set up, and the second hand hits the marks on the watch face exactly. After the time synchs with the atomic clock, it is amazing to compare with the time on your cell phone, and see the minute change on your phone at the same time as the second hand on your watch hits the twelve o’clock position. It is amazing to set the time zone to Tokyo and watch tha watch hands and date change like magic. The titanium bracelet and cas are so light weight that you don’t even notice that you are wearing a watch. A great bargain on a top quality watch. The brand may not have the same status as some, but the watch itself lacks nothing compared to the others. Update: After 3 months, This watch has become my daily watch. My dozen or so other watches have been sidelined, and I am considering selling most of them. I often wear another dressier watch in the evening, but this watch is so versatile and comfortable, there is little reason to wear anything else. It has missed synchronizing only one night in 3 months, and that is when we were staying overnight in an RV, although it worked the other nights in the camper. I have picked up a few minor scratches and tiny scuffs, but the finish is much harder to scratch than stainless steel or regular titanium. For traveling, this is the only watch I bother bringing. For a one watch guy, this could be the one for you. This is a little larger diameter than I usually wear, even with a 7.5” wrist, but is is still modest in size, and with the light weight, you don’t even notice you are wearing a watch. ### ⭐⭐⭐⭐⭐ Oceanus OCW S100-1AJF *by G***R on April 7, 2026* Oceanus OCW-S100-1AJF is a premium luxury watch that is arguably the BEST timepiece you can buy at any price. Titanium bracelet. Titanium case. Not titanium coated steel- all titanium. Weights less than half of most steel watches.Sapphire crystal. Polished to perfection. Solar powered any light source will charge it. Never needs winding or battery replacement. Will run for 7 months (on a full charge) even if kept in the dark. Radio controlled. Means that each night between midnight and 6 am it connects to one of 6 atomic clocks throughout the world and adjusts to the exact time. It will automatically adjust to the correct date no matter which month it is— including leap years. You never have to reset the time or date. If you travel to a different time zone it will automatically adapt to the exact date and time. If you pull and turn the crown you can choose whatever time zone you wish you don’t even have to be there. This is just for starters. Watch a YouTube video for more. You will want this watch shipped from Japan and it will be worth the wait. About 9 days for me. Import fees / duty charge was $70.08 and that cost could vary and will be in addition to the Amazon price. Mine was shipped DHL and I paid the fees to them. This is separate from the Amazon price. Also— this is important— DHL does a poor job of communicating. I had to search the emails to find and pay the duty fees— they didn’t just bill me. Took me 2 days to figure this out or I would’ve received the watch sooner. Last recommendation; get one shipped from Japan. Don’t worry about the extra time or money this watch is the real deal and worth it. Casio is a luxury brand in Japan. Highly respected and this timepiece is one of the reasons. ## Frequently Bought Together - CASIO Oceanus Men’s Solar Radio-controlled Watch OCW-S100-1AJF - Watch Band Strap Link Pins Remover Repair Tool,24 in 1 Kit with 6 Extra Tips Replacement,20PCS Cotter Pin,Spring Bar Tool Set,1PCS Head Hammer --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/11613324-oceanus-men-s-solar-radio-controlled-watch-ocw-s100-1ajf](https://www.desertcart.jp/products/11613324-oceanus-men-s-solar-radio-controlled-watch-ocw-s100-1ajf) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-31*