Finding the perfect swimwear for kids can be a challenge—especially with Japan’s wide variety of adorable, functional, and sun-safe options. Whether you’re planning beach days, poolside fun, or swimming classes, it’s essential to choose swimwear that’s not only stylish but also provides the right comfort and protection for your little ones. In this guide, we’ve handpicked some of the best swimwear for kids available in Japan in 2025 — from UV-protective rash guards to easy-dry one-pieces and playful prints that kids love. Dive in and discover the top choices that keep kids safe, comfortable, and full of confidence in the water.
If you are in a rush, you can buy the best item based on your budget, color and material preference, and our commendation given below. Based on our study, we concluded that-
– The Overall Best – Yolrky Baby Swimwear
– Best for Sun Protection – Lucky Kids Swimsuit
– The Editorial Choice – Solcy Kids Swimsuit
Best Swimwear for Kids in Japan
1. Emfay Kids Swimsuit
2. GoUseGo Kids Swimsuit
3. Yolrky Baby Swimwear
4. Lucky Kids Swimsuit
5. Regalo Baby Swimsuit
6. Solcy Kids Swimsuit
Here are the details of each swimwear for kids on the above list-
| Brand | Emfay |
| Material composition | 100% Polyester |
| Care instructions | Hand Wash Only |
| Color | Navy |
| Closure type | Buckle |
| Top style | Rashguard |
| Availed sizes | 90 cm to 150 cm |
Perfect for active little swimmers, the Emfay Kids Swimsuit is a practical and fun 3-piece set that includes a long-sleeve rash guard, matching swim pants, and a protective swim cap. Designed with a playful shark pattern, this set brings excitement to pool or beach time while keeping your child protected from the sun. Made from 100% polyester, the fabric is soft, stretchy, and gentle on delicate skin — ensuring comfort as kids move, play, and swim.
The sturdy elastic construction and secure buckle closure make it a reliable choice for energetic boys. Available in sizes from 100 to 150 cm, it offers a snug yet flexible fit for various age groups. Whether it’s a day at the beach or swim class, this Emfay swimsuit set balances safety, style, and performance — making it a great choice for parents seeking both function and fun.
| Brand | GoUseGo |
| Material composition | Polyester, polyurethane |
| Care instructions | Hand Wash Only |
| Color | Green tree, Gray stripe, Surfing, Shell, Ducks |
| Closure type | String |
| Top style | Rashguard |
| Availed sizes | 80 cm to 130 cm |
The GoUseGo Kids Swimsuit is a stylish and protective 3-piece set featuring a rash guard top, surf-style swim pants, and a matching cap — perfect for boys and girls from 80 to 130 cm tall. Designed for UV-heavy days at the beach or pool, the fabric offers UPF 50+ protection, blocking over 90% of harmful rays while keeping kids cool and comfortable. The playful prints, including elephants, ducks, and shells, add a fun, cheerful touch.
Made from a recycled polyester and polyurethane blend, this swimsuit is durable, quick-drying, and gentle on sensitive skin. With 3/4-length sleeves and excellent stretch, it supports easy movement without restricting play. Whether for school swimming lessons, outdoor adventures, or family beach trips, this eco-conscious and comfortable set combines function, fashion, and fun in one smart design.
| Brand | Yolrky |
| Material composition | Nylon, polyurethane |
| Pattern | Floral |
| Color | Beige |
| Closure type | Zipper |
| Top style | Rashguard |
| Availed sizes | 80 cm to 130 cm |
Yolrky Baby Swimwear is a charming and functional all-in-one swimsuit designed for baby girls. It features a long-sleeve rash guard style with a lovely floral print, offering both sun protection and adorable looks. Made from a blend of nylon and polyurethane, this swimwear is stretchy and comfortable, making it ideal for active little ones during beach outings or swim lessons.
The back zipper allows for easy dressing, while the full-body coverage ensures the tummy stays protected—perfect for energetic or easily chilled children. Available in sizes from 80 to 130 cm, it also comes with a matching cap for complete sun safety. This set is a great choice for summer leisure, baby swimming, or poolside fun.
| Brand | Lucky Kids |
| Material composition | Nylon, polyester |
| Care instructions | N/A |
| Color | Green, Orange |
| Closure type | Zipper |
| Top style | Rashguard |
| Availed sizes | 80 cm to 130 cm |
Lucky Kids Swimsuit is a fun and protective swimwear option designed for both boys and girls, featuring a vibrant dinosaur pattern and a matching hat. Made from a comfortable blend of nylon and polyurethane, this rash guard-style swimsuit offers UPF 50+ UV protection, helping to block harmful sun rays during outdoor play at the beach, pool, or park.
The fabric is moderately thick to protect delicate skin from scratches or chills when wet, making it perfect for nursery school water play or family outings. With a convenient front zipper and stretchy design, it’s easy to put on and take off. Available in sizes from 90 to 130 cm, this swimsuit is ideal for active children who love adventure but need reliable sun safety.
| Brand | Regalo |
| Material composition | 84% Polyester, 16% Elastane |
| Care instructions | Washing machine |
| Color | Little moon, Ridestar |
| Closure type | Zipper |
| Top style | Rashguard |
| Availed sizes | 80 cm to 130 cm |
Regalo Baby Swimsuit is a stylish and protective swimwear set that includes a long-sleeve rash guard top, matching bottoms, and a UV-blocking swim cap—perfect for sunny beach or pool days. Made from a stretchy blend of 84% polyester and 16% elastane, this swimsuit offers UPF 50+ protection and is designed to move with your child for all-day comfort.
The thoughtful design includes a zipper with a protective cover to avoid skin irritation, a high-neck collar for added sun defense, and an adjustable drawstring waistband for a secure fit. Breathable and quick-drying, this swimsuit is also machine washable for easy care. Ideal for babies and toddlers, it’s a great pick for parents who want both UV protection and fuss-free functionality.
| Brand | Solcy |
| Material composition | 80% Polyamide, 20% Spandex |
| Care instructions | Hand Wash Only |
| Color | Safari print, Vehicles, Flower, Dinosaur, Sea Creatures |
| Closure type | Zipper |
| Neck style | Turtle Neck |
| Availed sizes | 80 cm to 130 cm |
Solcy Kids Swimsuit is a feature-rich 3-piece swimwear set designed to offer both fun and full-body sun protection. Made from a durable and stretchy blend of 80% polyamide and 20% spandex, it includes a long-sleeve rash guard, adjustable swim cap, and inner-lined pants—all crafted for comfort and UV safety. The high-density fabric is not only soft on the skin but also helps resist sand from getting trapped, making it perfect for beach play.
With UPF 50+ protection, long sleeves, and a flap-equipped cap, this swimsuit offers comprehensive coverage against harmful UV rays. Thoughtful extras like the anti-curling snap buttons, adjustable waistband, front zipper with skin-safe lining, and name tag space make it ideal for active summer outings and group activities. A practical and playful choice for boys who love the water and need reliable protection all day long.
Buying Guide: How to Choose the Best Swimwear for Kids in Japan
When selecting swimwear for your child, comfort, protection, and durability are key. Here are some important factors to consider:
1. UV Protection (UPF Rating)
Look for swimsuits with a UPF (Ultraviolet Protection Factor) of 50+, which blocks over 98% of harmful UV rays. This is essential for long beach days or outdoor water play under Japan’s summer sun.
2. Material & Breathability
Opt for swimwear made of polyester, nylon, or spandex blends, which offer stretch, quick drying, and breathability. These materials also retain shape well and provide flexibility for active children.
3. Coverage & Design
Rash guard-style swimsuits with long sleeves and high necks provide extra sun protection. Choose sets with swim caps and inner pants for added comfort and modesty. Fun patterns (dinosaurs, animals, floral prints) make the outfit enjoyable to wear.
4. Fit and Size Options
Japanese swimwear sizes are usually marked in centimeters, so match the height of your child for a better fit (e.g., 100 cm = approx. 3–4 years). Look for options with adjustable waists or drawstrings for growing kids.
5. Ease of Use
Zipper closures, especially on the front or back, make it easy to take on and off—even when wet. Snap buttons and two-piece sets are great for hassle-free diaper or toilet changes.
Frequently Asked Questions (FAQs)
Q1: What does UPF 50+ mean in kids’ swimwear?
A: UPF 50+ means the fabric blocks 98% or more of the sun’s harmful UV radiation, offering excellent protection for your child’s sensitive skin.
Q2: Is it better to buy a one-piece or two-piece swimsuit for kids?
A: Both have benefits. One-piece suits (like all-in-one rash guards) offer full coverage and fewer chances of fabric slipping. Two-piece sets are easier for diaper or bathroom breaks and allow for more flexible sizing.
Q3: Can my child wear swimwear for both pool and beach activities?
A: Yes! Most kids’ swimwear featured here is versatile and water-resistant, suitable for the pool, beach, or even water parks. Some even include sand-resistant fabric, perfect for beach play.
Q4: How should I wash and care for kids’ swimsuits?
A: Hand wash or use a laundry net on a gentle cycle. Avoid bleach and tumble drying. Always rinse with fresh water after swimming to remove chlorine or salt.
Q5: What size should I choose when buying swimwear from Amazon Japan?
A: Check the product’s size chart, typically in centimeters. Measure your child’s height for the most accurate fit, and consider sizing up if they are between sizes.
Conclusion
Choosing the right swimwear for your child makes all the difference for a fun and safe summer. Whether your little one loves dinosaurs, florals, or cool surfing prints, the options available in Japan combine style, comfort, and superior UV protection. With features like rash guards, inner pants, adjustable waists, and sun-shielding caps, these swimsuits are built to keep kids protected and parents worry-free. Invest in quality swimwear now so your child can make the most of every splash, dive, and beach day this season!
To read more reviews, you can go through our articles on best tablets for kids, best school bag for kids, best car seats for babies, or other baby products category on the Sakuron Japan website.
– Our editorial team reviewed this article and approved it for publication according to our editorial policy.
You can also check the Amazon bestseller list for best swimwear for kids:
![[FFTQTOYS] 女の子用 セパレート水着 2点セット 水着 キッズ 水遊び水着 キッズ スイミング スクール水着 上下セット スイムウエア 紫外線対策 プール ビーチ 温泉対応 快適素材 軽量設計 夏の定番 可愛いデザイン パープル (140-150センチメートル)](https://m.media-amazon.com/images/I/31NMkELQIgL._SL160_.jpg)
- 商品仕様：セット内容：パープル、水着、水泳パンツ。材質：ポリエステルファイバー、スパンデックス。サイズ：140。着用後はすぐにきれいな水で手洗いし、日陰で自然乾燥させてください。
- 紫外線対策で安心：この水着は紫外線対策機能を備えており、お子様のデリケートな肌をしっかり保護します。プールやビーチでの長時間の水遊びでも、安心して遊ばせることができます。軽量で快適な素材を使用しているため、動きやすく、お子様もストレスなく楽しめます。
- 快適な着心地：柔らかく伸縮性のある素材を使用しており、お子様の動きを妨げません。軽量設計で水の中でも重く感じず、長時間の使用でも快適です。縫製も丁寧で、肌に優しい仕様となっており、敏感肌のお子様にもおすすめです。
- 上下セットで便利で使いやすい：セパレートタイプの2点セットで、着脱が簡単で便利です。上下別々に洗濯できるため、お手入れも楽々。温泉やプール、ビーチなど、さまざまなシーンで活躍します。上下セットのデザインは、お子様の体型に合わせて調整しやすく、快適なフィット感を実現します。洗濯後も乾きやすい素材を使用しているため、忙しい親御様にも嬉しい設計です。
![[Emfay] キッズ 女の子 水着 セパレート フラミンゴ柄 長袖 女児水着 ラッシュガード キャップ付き ピンク 90-100cm](https://m.media-amazon.com/images/I/41fGI1SgTBL._SL160_.jpg)
- セット内容：トップス、パンツ、キャップ
- サイズ：90（身長80-90cm）、100（身長90-100cm）、110（身長100-110cm）、120（身長110-120cm）、130（身長120-130cm）、140（身長130-140cm）、150（身長140-150cm）
- ラッシュガード仕様で伸縮性があり、とても着心地がよいデザイン。セパレートタイプで着脱しやすくお子様の負担になりにくい。
- お子様のお肌を守るために、対塩素加工だから塩素入りプールでも安心！
![[Lucky kids] キッズ 水着 ラッシュガード 男の子 女の子 恐竜 UPF50+ UVカット 子供 ベビー スイムウェア 紫外線防止 帽子付き プール 水遊び 海水浴 保育園](https://m.media-amazon.com/images/I/411x4GNTWrL._SL160_.jpg)
- キッズ 水着 ラッシュガード 男の子 女の子 恐竜 UPF50+ UVカット 子供 ベビー スイムウェア 紫外線防止 帽子付き プール 水遊び 海水浴 保育園 90 100 110 120 130 ボーイズ 赤ちゃん オールインワン 日焼け防止 ロンパース 水泳教室 かわいい おしゃれ
- 子供のお腹の日焼けが気になるママさんにお勧めです。適度な生地の厚みが擦り傷や、けがを防止。水温が低いときや、水から上がった時の寒さを軽減してくれます。
- 生地はUVカット機能があって、有害な紫外線を有効的に遮断！
- ラッシュガードタイプの水着で伸縮性があり、チャック付きなので脱ぎ着がやすいで着替えるのも簡単！
![[NexTrendy] キッズ 水着 3点セット 子供用 セパレート水着 男の子 女の子 ジュニア (JP, 身長, 110, C ホワイト×ネイビー)](https://m.media-amazon.com/images/I/516SOBxGlYL._SL160_.jpg)
- 幼児－中学生位までキッズ水着 上着（ラッシュガード）＋水泳パンツ＋スィムキャップの3点セットです。上着ラッシュガードで紫外線カット。 しっかり日焼け対策！
- 吸汗性・速乾性でサラッとした快適な着心地。伸縮性もあり動きやすい！上下セパレート着脱が楽にして頂け、トイレに便利です！
- 速乾性に優れた水着素材なのでトレーニングウェアとしてもOK！水中では保温効果があり､陸に上がった時はすぐ乾きます。 アウトドアでの虫さされ防止、海でのクラゲよけにもお使いいただけます。
- 子供に人気のデザインで見た目もかわいい♪ プール、海水浴、スクール水着としてはもちろん、アウトドア、キャンプ、スポーツなど幅広く活躍します。
![[Ymgot] キッズ 水着 女の子 オールインワン 女の子 水着 セパレート 3点セット 長袖 UVカット カーディガン リボン 肩紐調節 幼稚園 保育園 小学生 (120)](https://m.media-amazon.com/images/I/312zzsiuAyL._SL160_.jpg)
- セット内容；ワンピース水着（オールインワン）トップス，キャップ
- カーディガンとオールインワン水着の組み合わせ子供おしゃれな水着です
- オールインワンタイプで動きまわるお子様にも安心、砂浜遊びでも水着の中に砂の侵入をブロックしてくれます。
- キャップが付いて、とびきりキュートな全身コーデはセット、水泳の練習に嬉しい、
![[Ymgot] 子供 水着 女の子 セパレート キッズ 女児 水着 長袖 ラッシュガード ベビー水着 ガールズ スイムウェア スイミング (120)](https://m.media-amazon.com/images/I/412PQ4Y1xZL._SL160_.jpg)
- 鮮やかな色合いと可愛いデザインな子供水着です
- 女の子水着セパレートでお子様ご自身で着脱が楽にして頂け、トイレに便利です！
- 長袖ラッシュガード はお子様の 日焼け防止のマストアイテム。海やプールでも紫外線から守ってくれます。
- 海水浴やプールで大活躍します！水泳トレーニング、夏のサーフィン、ビーチの休暇にも！
Last update on 2025-07-18 .
