A First G-SHOCK for Your Child Starting High School
By Kotaro·Updated Sep 13, 2026·8 min read
This guide contains affiliate links: if you buy through one, the shop may pay me a small commission at no extra cost to you. How I choose and how I earn
A gift guide for parents: choosing a first G-SHOCK for a teenager starting high school — what to check about the child first (do they want a watch, digital or analog, wrist size, school rules, budget), three current Japanese-market models with Casio's official specs and the shop's prices, and why letting them choose the colour can be part of the gift.
I was in high school when I got my first G-SHOCK. My girlfriend at the time gave it to me for my birthday, and for a high-school student it was a serious present. I was so pleased I wore it everywhere, every day. I liked that it was tough and didn’t mind water, and I’ve worn a good number of G-SHOCKs since. The full story, and the three I’d pick for myself, are here.
I still remember how it felt to be given one at that age. That’s why, when a parent asks what to give a child starting high school, a G-SHOCK is the first thing I think of — and why this page is written for that parent, not for me.
A watch for the start of high school
In Japan, starting a new school is a milestone people mark with a gift — an nyūgaku iwai, literally “entrance celebration”. Grandparents, aunts and uncles send something for the new chapter; parents often give one thing the child will use every day of it. Whether your family does the same, the idea travels well: a first watch for a first year.
A G-SHOCK suits the moment for practical reasons. It’s built to be knocked about, it doesn’t need to come off for swimming or rain, it’s light, and it’s priced where a parent can give it without it being a burden or a big deal. It’s also, still, the watch teenagers in Japan actually wear.
I’m a designer in Japan, not a watch reviewer. I haven’t used the three models below; what follows is Casio’s own specifications, the shop’s prices and conditions, and the questions worth asking before you choose.
First, about your child
Five things to know before you look at models. Most take one conversation.
- Do they want to wear a watch? Some teenagers do, some check their phone. A watch given to someone who won’t wear it is a drawer ornament. If you’re not sure, ask — or make the choosing part of the gift (see the end of this page).
- Digital or analog, and what colour? The 5600 square is the classic digital. The 2100 shape has hands plus a small digital window. Colour is the thing they’ll have the strongest opinion about; black is the safe default, but the GA-2100 and GMA-S2100 come in many others.
- Wrist size and weight. Measure the wrist. Casio publishes a band fit range for most models (below). All three here are light — 41 to 52 grams — but the 2100 shape is noticeably slimmer on the wrist than the 5600.
- School and club rules. Exams, sports, uniform codes. A black resin watch passes almost everywhere; a bright one may not.
- Features and budget. A stopwatch and alarm are on all three. Solar charging and phone-set time cost more. From the shop, the range is roughly ¥14,000 to ¥25,000 before shipping.
Three to compare
All three are current Japanese-market models, in stock at Discovery Japan Mall on 12 September 2026. Specifications are Casio Japan’s; prices are the shop’s in yen that day, before shipping and duty. They’re listed by type, not by price.
| DW-5600UE-1JF | GA-2100-1A1JF | GA-B2100-1AJF | |
|---|---|---|---|
| Suits | A clear digital display; the lowest price | An analog-hands look; a slim case | No battery changes, no time-setting |
| Display | Digital | Analog hands + digital window | Analog hands + digital window |
| Case (H×W×D) | 48.9 × 42.8 × 13.4mm | 48.5 × 45.4 × 11.8mm | 48.5 × 45.4 × 11.9mm |
| Weight | 52g | 51g | 52g |
| Band fits | 145–205mm | 145–215mm | 145–215mm |
| Power | Battery, about 5 years | Battery, about 3 years | Tough Solar |
| Time-setting | By hand | By hand | Automatic via phone (Bluetooth) |
| Shock / water | Shock-resistant, 20 bar | Shock-resistant, carbon core guard, 20 bar | Shock-resistant, carbon core guard, 20 bar |
| Shop price | ¥14,014 | ¥17,248 | ¥24,552 |
For a clear digital display: DW-5600UE-1JF
Who it’s for. The child who wants a watch to tell the time, set an alarm and time a run — and who likes the classic square. Also the one to give if you’re unsure, because it’s the least expensive and the most recognisable.
Why this one. It’s the 2023 update of the 5600 square, the basic G-SHOCK shape since 1983. Casio’s changes over the older DW-5600E: a white LED backlight instead of EL, and a battery life rated at about 5 years instead of 2. Same case, same weight class.
Casio’s specifications. Case 48.9 × 42.8 × 13.4mm; 52g; resin case, bezel and band; shock-resistant structure; 20-bar water resistance; battery life about 5 years; band fits 145–205mm wrists; stopwatch, timer, one alarm, hourly chime, auto calendar; accuracy ±15 seconds a month.
Know before you buy. Time is set by hand with the buttons — fine for most teenagers, but if you know yours won’t bother, look at the GA-B2100. The 5600 is slightly thicker than the 2100 shape.
Box. Casio retail box and manual; the shop doesn’t list further contents.
For an analog-hands look: GA-2100-1A1JF
Who it’s for. The child who’d rather read hands than digits, or who cares what the watch looks like with everything else they wear. This is the shape that made G-SHOCK a fashion object again, and the one teenagers in Japan ask for by name.
Why this one. At 11.8mm it’s the slimmest of the three and sits flat under a sleeve. The all-black -1A1 is the most neutral version; the same watch comes in many other colours (see below).
Casio’s specifications. Case 48.5 × 45.4 × 11.8mm; 51g; carbon-fibre-reinforced resin case; shock-resistant carbon core guard structure; 20-bar water resistance; battery life about 3 years; band fits 145–215mm wrists; world time, stopwatch, timer, five alarms, double LED light, hand-shift function (moves the hands off the digital window); accuracy ±15 seconds a month.
Know before you buy. The digital window is small; it’s an analog watch with a digital helper, not a digital watch. Time is set by hand. The 45.4mm width is on the larger side for a narrow wrist — which is what the next watch is for.
Box. Casio retail box and manual; the shop doesn’t list further contents.
For a smaller wrist: GMA-S2100. The same design, scaled down: Casio’s specifications are case 46.2 × 42.9 × 11.2mm and 41g, with the same shock-resistant carbon core guard, 20-bar water resistance and about 3-year battery. Casio doesn’t publish a band fit range for it, so measure and compare against the 145mm lower limit of the full-size model rather than assuming. The shop stocks it in white (below) and black, among others.
For no battery changes and no setting: GA-B2100-1AJF
Who it’s for. The child who’ll wear it for years without thinking about it — and the parent who doesn’t want to hear “the watch stopped” in year three.
Why this one. It’s the GA-2100 shape with two things added: Tough Solar charging, and Bluetooth to the Casio Watches app so the time (and time zone, on a trip) sets itself from the phone. Same slim case, one gram heavier.
Casio’s specifications. Case 48.5 × 45.4 × 11.9mm; 52g; carbon-fibre-reinforced resin; shock-resistant carbon core guard; 20-bar water resistance; Tough Solar with battery indicator and power-saving; Bluetooth automatic time correction via the Casio Watches app; band fits 145–215mm; world time, stopwatch, 60-minute timer, five alarms, double LED light, phone finder.
Know before you buy. Solar means it needs light — a watch kept in a drawer will run down, and Casio’s page has a battery indicator for that reason. Bluetooth time-setting needs the app on the child’s phone and an occasional connection; without it, the time is set by hand like the others. It’s the most expensive of the three by about ¥7,000 over the GA-2100.
Box. Casio retail box and manual; the shop doesn’t list further contents.
Box, wrapping, shipping and returns
Two separate things: the product box, and gift wrapping. All three come in Casio’s retail box. Gift wrapping isn’t listed as a standard service by the shop; if you want it wrapped, ask Discovery Japan Mall before ordering, or wrap it yourself when it arrives.
What the shop states, as of 12 September 2026: it ships to more than 120 countries; orders usually ship within 5 business days; every order has tracking and shipping insurance; shipping cost is calculated at checkout by destination and weight; customs duties and taxes, where charged, are collected on delivery and aren’t in the price. Transit time depends on the destination and carrier, so don’t plan on a specific date — order early for a term start. Returns are accepted only for damaged, defective or incorrect items, reported within 7 days of delivery with photos. Warranty is Casio’s in Japan; the shop states the customer pays shipping to return a watch for warranty service. Check the shop’s current conditions before you order: its returns and exchanges page, and the shipping summary on How to Buy.
How to buy from Japan
Okurimono Japan doesn’t sell anything. “Check Price” takes you to the product page on Discovery Japan Mall, an independent Japanese retailer (not Casio’s own shop) that ships internationally and shows prices in your currency. You pay them directly by card or PayPal. Prices on this page are the shop’s yen prices on 12 September 2026, converted approximately, before shipping and duty. Full details on How to Buy, and more on Japanese watches for a graduation or first job and in the Watches category.
Let them pick the colour
A surprise is one way to do this. Another is to sit down together with the three above, ask which shape they like, and let them choose the colour — the GA-2100 alone comes in a dozen. You still give the watch; they get to have chosen it. For a fifteen-year-old, being asked what they want is a gift of its own, and the half hour spent choosing is part of the celebration. Either way, the first day of school comes with something on their wrist that was picked for them, and that they’ll put on without thinking, every morning after.
Frequently asked questions
- Is a G-SHOCK a good gift for a teenager starting high school?
- For most teenagers who'll wear a watch, yes. The models here are shock-resistant by design, water resistant to 20 bar, light (41–52g), and priced between roughly $95 and $170 from Japan. The main question isn't the watch; it's whether your child wants to wear one at all, and which look they'd choose.
- Which G-SHOCK is best for a first watch?
- Depends on the child. For a clear digital display and the lowest price, the DW-5600UE-1JF. For an analog-hands look with a slimmer case, the GA-2100-1A1JF (or the smaller GMA-S2100 for a narrower wrist). For no battery changes and no time-setting, the solar and Bluetooth GA-B2100-1AJF. None of the three is 'better'; this guide doesn't rank them by price.
- Will a G-SHOCK fit a teenager's wrist?
- Casio publishes a band fit range for two of the three: 145–205mm for the DW-5600UE and 145–215mm for the GA-2100 and GA-B2100. Measure the wrist with a tape or a strip of paper. Casio doesn't publish a fit range for the mid-size GMA-S2100, so this guide doesn't state one.
- Do G-SHOCKs need battery changes or setting?
- The DW-5600UE and GA-2100 run on a battery Casio rates at about 5 and 3 years respectively, and the time is set by hand. The GA-B2100 charges from light (Tough Solar) and sets its time from a phone over Bluetooth; it still needs light and an occasional app connection — it isn't 'no maintenance', just less.
- Are these Japan-only models?
- No. The 'JF' suffix means the Japanese-market version; Casio sells the same or equivalent models in other countries under slightly different references. The versions here are what the Japanese shop stocks, at the prices shown; this guide doesn't claim they're unavailable elsewhere.
- Can a G-SHOCK be worn to school?
- Usually, but check. Some schools restrict watches in exams, some sports ban them, and some uniform rules limit colour. Ask your child before buying — a black model is the safe answer if you can't.
- Do they come in a box, and can the shop gift-wrap?
- G-SHOCKs ship in Casio's retail box with the manual; the shop's product pages don't itemise contents beyond that. The shop doesn't list gift wrapping as a standard service, so confirm with Discovery Japan Mall before ordering if presentation matters.
- How long does delivery from Japan take, and what about returns?
- The shop states orders usually ship within 5 business days with tracking and insurance; transit depends on the destination and carrier. Don't count on a specific date. Returns are accepted only for damaged, defective or incorrect items reported within 7 days with photos; the warranty is Casio's in Japan, and the shop states the customer pays return shipping for warranty service.
