Skip to search
Bestsellers     New arrivals     Limited Time Sale     59,167 Items
Japan Time: 1:32 AM     Select language
Europe, UK: Friday, Mar 21 ~
USA: Wednesday, Mar 19 ~
Australia: Friday, Mar 21 ~
Asia: Thursday, Mar 20 ~
UAE: Thursday, Mar 20 ~

Order within 10 Hours 27 mins with Scheduled Delivery. If you place an order within this time, We will ship Wednesday, Mar 19 2025. This delivery time is calculated by DHL and FedEx. You can check the exact delivery date on checkout page.

Buyer Protection

Full refund if not genuine. Full or partial refund, if the new item is not as described.

Write a review!


★★★★★ 'Stealth' quartz watch, good fit and finish
Date posted : Monday, Jan 17 2022

Great watch, containing (for me) the bare necessities for time keeping. Looking at it you would maybe not expect it contains solar cells, and that it keeps itself synchronized via radio. The hands are classically styled, which I like better than the design of the hands of most other watches from Casio. The fit and finish is surprisingly good, and the visibility of the dial is good. Changing the bracelet size took some work though (it was fun doing it, making me feel like a watch maker :) )

Was this review helpful?
Yes   No    Report



★★★★★ This is a fine watch
Date posted : Thursday, Oct 3 2019

This watch is certainly a five star plus product. The accolades mentioned by the other purchasers certainly ring true. Oh yes, the watch face is quite intriguing the way it is designed. There are tiny blue cut crystals directly under the metal/luminous indices. Viewed directly from above they are not noticeable. Depending on the viewing angle due to the refraction of light through the sapphire some of these blue gems can be discreetly seen. The radio 'time check'feature works well for me being located in New Orleans, Louisiana. All said and done I am delighted with this watch.

Was this review helpful?
Yes   No    Report



★★★★★ The Perfect Watch
Date posted : Monday, Aug 26 2019

This is a beautiful and accurate watch. Received my from Japan in 6 days even though the shipping estimate was 1 1/2 to 2 months. The instruction book is well written and easy to understand and setting the watch up only takes a few minutes. I have already received compliments on how stunning this watch looks. I highly recommend this watch to someone who wants accuracy and beauty in a wrist watch,

Was this review helpful?
Yes   No    Report



★★★★★ Great grab and go quartz.
Date posted : Monday, Jun 17 2019

Great simple 3 hander watch that has atomic feature. Just want to clarify the size. The 41.5mm diameter includes the crown. It is 39-40mm without and will fit smaller wrist size (even sub 6") due to the short lug to lug length. The blue accents are a nice touch, including the blue ring above the chapter ring. It feels very sturdy, although light due to the titanium. The crown is a push, not screw down. Integrated bracelet/case design so a normal strap won't fit without cutting the center out. The lume is blueish and fairly bright. The bracelet comes with 2 half links and the clasp has 2 spots for attaching the bracelet to (this is the micro adjustment). The links are secured with a roll and pin (the roll falls out easily when the pin isn't it in so be careful when sizing). I believe the links are solid (not hollow center). The clasp is a single deployant with dual push buttons. The radio sync doesn't know your timezone, so you need to set it to the correct timezone. The second hand looks on point for each mark, better than some quartz double this price range. There is a button at 2 o'clock that does not protrude pass the case and would not be needed for normal operations. It's for lining up the hands, date, changing to special time zones, turn on and off radio sync, etc etc). The button on the 4 o'clock is for manual sync and to check to see if see if it successfully synced last time. It is less than 10mm thick so will fit under any cuff without issues. This watch is perfect for traveling since all you have to do is pull the crown out and move it to the new timezone you're in. Even if you are unable to sync to the correct time for a month, it will probably still be correct to the minute.

Was this review helpful?
Yes   No    Report



★★★★★ Wearable art; bracelet adjustment isn't easy
Date posted : Tuesday, May 28 2019

Arrived from Japan in a week, considerably faster than the estimate. It tells time beautifully, elegantly, simply. The Oceanus is wearable art. One caveat: resizing the bracelet is not a trivial task, and I'm not sure that I'd entrust that to the corner jewelry shop. I was able to accomplish it in about 90 minutes using materials I found online--search for "Oceanus Bracelet adjustment reddit".

Was this review helpful?
Yes   No    Report



★★★★★ Nicer than a Mavado and it's always on time!
Date posted : Tuesday, May 7 2019

I had a Mavado and for half the price this watch is worth more then the Mavado! Looks great and a lot of compliments on it. They can't believe it's a Casio. Hope to never have to buy another watch again!

Was this review helpful?
Yes   No    Report



★★★★★ Never have to worry if the time is correct.
Date posted : Tuesday, Apr 30 2019

All in all, the watch performs and is exactly as advertised. I do believe it's a "bit" overpriced compared to similar brands with like functions. The watch arrived within ten days of its order (Japan to USA) The blue illuminating coatings on the five minute mark locations is a little too reflective in daylight hours and somewhat "cheapens" the watches appearance/quality. I'm afraid to ask what the cost of a replacement battery will "run" when this one dies. Only time will tell!

Was this review helpful?
Yes   No    Report



★★★★★ Absolutely Awesome Watch and Great Piece of Jewelry
Date posted : Saturday, Apr 13 2019

This is an excellent watch as jewelry goes. Band is awesome. Fits like a glove. Face is just plain beautiful. And it's a lot less pronounced than the Seiko titanium kinetic it replaced. It also syncs like clockwork every night with the radio time broadcast. And the perpetual calendar and automatic time zones are just crazy simple and unbelievably helpful. Fit and trim? That's awesome too. The second hand stops dead center on each tick and the hour and minute hands are equally well precise (things I'm very sensitive too). So why just three stars? Because it's so darn hard to tell the time. The crystal is highly reflective, so if there's any kind of light or well lit object bouncing off the surface, you have to stop and twist your wrist one way or the other to get an obstructed view of the watch face. Plus, there's some kind of secondary light blue reflection of the same objects that are offset from the primary reflection, and they add to the distraction. Without all the competing reflections the watch face is just great. So that's one star off. The other star deduction is for the date window. If you look straight at it, with sufficient light, it's fine. But the dial with the digits is recessed below the surface by enough distance that viewing angle is limited more than it should be. Plus, it's not as easy to read under some lighting situations. I think it would have been more readable with a background that matched the face and white lettering, instead of black lettering on a white background.Update 07/26/2017: 3/4 of a year later and have grown even more fond of this watch. I've gotten used to the (rather) reflective crystal, and now feel it actually adds to and enhances the "jewelry" element (which isn't necessarily one of my higher priorities, but still appreciated). So, I'm adding back the one star previously deducted for that. The date dial being recessed enough to make viewing on an angle difficult, still warrants a one-star deduction (since a rating of 4.5 isn't possible). 1 of 1 people found the following review helpful

Was this review helpful?
Yes   No    Report


     Description (3,013 characters)

Set contents: Body, box, instruction manual
Waterproof reinforcement for everyday life: 10BAR
Radio stations for 6 stations around the world (Japan x 2, North America, UK, Germany, China)
Needle position automatic correction function
Anti-reflective coating dual curve sapphire glass
Target: Men
Country of origin: Japan
※ When radio wave reception is not performed, it operates with normal quartz accuracy (average monthly difference ± 15 seconds)


Product introduction From the Oceanus classic line, a model equipped with “smart access” that adopts high-quality finishing and materials on a simple 3-needle model and combines multifunctionality and excellent operability

With the smart access, you can operate the world time function only by pulling and turning the crown, and you can easily correct the time difference when using it overseas.

The hour, minute, second hands and date are independently driven, and the time of a city with a time difference that straddles the day can be displayed quickly.

In addition, the thickness has been reduced to 10.5mm.

Adopted the first dual-curve sapphire glass for the windshield as a three-hand model

Reduces the reflection of light and balances beauty and visibility

In addition, high quality finishes with little distortion, and a band with a vest structure that is beautiful and comfortable to wear, are used to ensure high quality in every detail.

Sporty black and blue 3 stitches Oceanus


・ Tough solar (solar charging system)
・ 10 ATM water resistant function
・ Radio wave reception function: Automatic reception (up to 6 times / day, China radio wave up to 5 times / day) / manual reception, applicable area / Japan / North America / Europe / China * Receive home time setting When set to a possible city, you will receive stations that match the city

The time difference is set by the selected city


-Hand position automatic correction function Stops hand movement after elapse and saves power.)
・ Date display
・ Fully automatic calendar
・ Driving time without solar power generation from full charge Operates with normal quartz accuracy (average monthly difference ± 15 seconds)

OCEANUS which continues to pursue high quality and high performance based on the brand concept of Elegance, Technology

The challenge of pursuing absolute precision, the movement of moving hands at high speed, and the persistent commitment to "blue"

Born from a sense of adventure and playfulness that is not bound by the common sense of watchmaking


Model Number: OCW-S100-1AJF


Items Similar to 'OCEANUS' !

CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
CASIO Oceanus CLASSIC LINE Blu...

55,671 YEN 54,001 YEN
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
CASIO OCEANUS radio wave solar...

61,392 YEN 59,550 YEN
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
CASIO Oceanus electric wave so...

61,392 YEN 59,550 YEN
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
CASIO Oceanus CLASSIC electric...

90,283 YEN 87,574 YEN
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
CASIO OCEANUS Bluetooth equipp...

132,550 YEN 128,574 YEN
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
CASIO Oceanus electric wave so...

70,358 YEN 68,247 YEN
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
Oceanus Classic Line Square OC...

139,178 YEN 135,003 YEN
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
CASIO OCEANUS CLASSIC LINE Blu...

129,250 YEN 125,373 YEN
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
CASIO Oceanus CLASSIC electric...

115,365 YEN 111,904 YEN
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver
CASIO Oceanus Manta radio sola...

144,760 YEN 140,417 YEN

Related products

CASIO Oceanus electric wave solar OCWS100B1AJF black

70,358 YEN 68,247 YEN
CASIO Oceanus electric wave solar OCW-T150-2AJF silver

61,392 YEN 59,550 YEN
CASIO OCEANUS radio wave solar OCW-T150-1AJF silver

61,392 YEN 59,550 YEN
CASIO OCEANUS CACHAROT radio wave solar OCW-P1000-1AJF silver

149,586 YEN 145,098 YEN
CASIO Oceanus CLASSIC electric wave solar OCW-T2600-1AJF silver

90,283 YEN 87,574 YEN
CASIO Oceanus Manta radio wave solar OCW-S3400-1AJF Silver
167,013 YEN 162,003 YEN
CASIO Oceanus CLASSIC electric wave solar OCW-T2600B-1AJF black

115,365 YEN 111,904 YEN
CASIO OCEANUS black marble GPS hybrid radio solar OCW-G1100TG-1AJF silver

206,377 YEN 200,186 YEN
CASIO OCEANUS Bluetooth equipped GPS radio solar OCW-G2000-1AJF Men s Silver

257,500 YEN 249,775 YEN
CASIO Oceanus CLASSIC electric wave solar OCW-T2610H-7AJFMen's silver

148,638 YEN 144,179 YEN

Customers who purchased this item also purchased

Latest Model
CASIO Oceanus CLASSIC LINE Bluetooth equipped radio solar OCW-T200S-1AJFMen's Silver

55,671 YEN 54,001 YEN

Products Similar to 'CASIO'

CASIO Oceanus electric wave so... 4971850958550

Set contents: Body, box, instruction manual
Waterproof reinforcement for everyday life: 10BAR
Radio stations for 6 stations around the world (Japan x 2, North America, UK, Germany, China)
Needle position automatic correction function
Anti-reflective coating dual curve sapphire glass
Target: Men
Country of origin: Japan
※ When radio wave reception is not performed, it operates with normal quartz accuracy (average monthly difference ± 15 seconds)


Product introduction From the Oceanus classic line, a model equipped with “smart access” that adopts high-quality finishing and materials on a simple 3-needle model and combines multifunctionality and excellent operability

With the smart access, you can operate the world time function only by pulling and turning the crown, and you can easily correct the time difference when using it overseas.

The hour, minute, second hands and date are independently driven, and the time of a city with a time difference that straddles the day can be displayed quickly.

In addition, the thickness has been reduced to 10.5mm.

Adopted the first dual-curve sapphire glass for the windshield as a three-hand model

Reduces the reflection of light and balances beauty and visibility

In addition, high quality finishes with little distortion, and a band with a vest structure that is beautiful and comfortable to wear, are used to ensure high quality in every detail.

Sporty black and blue 3 stitches Oceanus


・ Tough solar (solar charging system)
・ 10 ATM water resistant function
・ Radio wave reception function: Automatic reception (up to 6 times / day, China radio wave up to 5 times / day) / manual reception, applicable area / Japan / North America / Europe / China * Receive home time setting When set to a possible city, you will receive stations that match the city

The time difference is set by the selected city


-Hand position automatic correction function Stops hand movement after elapse and saves power.)
・ Date display
・ Fully automatic calendar
・ Driving time without solar power generation from full charge Operates with normal quartz accuracy (average monthly difference ± 15 seconds)

OCEANUS which continues to pursue high quality and high performance based on the brand concept of Elegance, Technology

The challenge of pursuing absolute precision, the movement of moving hands at high speed, and the persistent commitment to "blue"

Born from a sense of adventure and playfulness that is not bound by the common sense of watchmaking


Model Number: OCW-S100-1AJF

490
4971850958550 In Stock
5 stars - out of 16 reviews