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 2026 — 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:
![[サニーハグ] スクール水着 女の子 スカートタイプ 上下 学校の授業で使える キッズ 小学生 中学生 UPF50+紫外線対策加工 学校標準仕様 プール スイミング ネイビー 140∼カップ付き (130, ネイビー)](https://m.media-amazon.com/images/I/21OKTFUJ1KL._SL160_.jpg)
- 【2022年Amazon日本ストアCM出演ブランド】学校のプールの授業、スイミングスクール、遊びでも使える学校標準規格のスクール水着！仕様、色、サイズ共に学校指定に合わせて作っていますので自信を持ってオススメします。買いに行く時間がない、急に必要、量販店は値段が高い、、、そんな時はSunnyHugのスクールシリーズをご利用下さい！ また、sunnyhugは体操服、スクールポロシャツ、スクールシャツ、スクール上履きなど様々なスクール商材をご用意しております。「sunnyhug(サニーハグ)のストアを表示」をクリックし商品ラインナップをご確認ください。
- 【スクール水着定番スカートタイプ】SunnyHugのスクール水着は、学校のプールの授業で使われる定番のUネック型スカートタイプの女の子用スクール水着です。 しっかりとストレッチが効いていて大変動きやすく、軽量素材なのでアクティブな動きにも対応。思いきり水泳を楽しんで頂けるようこだわりました。また、お子様でも着脱もしやすい水着になっております。（140cm以上は取り外して洗濯も可能なカップ付きです！）
- 【UPF50＋紫外線対策加工&吸水速乾】 SunnyHugのスクール水着は、UPF50+の紫外線対策加工が施されているので、しっかりと紫外線から肌を守ります。肌に敏感なお子さんでも安心して着用して頂けるスクール水着に仕上げました。 ※腕や首下は守れませんので市販のラッシュガード等をお使い下さい。また、乾きやすい素材でお洗濯がラクに！プールの授業が続いても、翌朝には乾いてるので安心です。さらに、丈夫な生地なので洗濯を繰り返しても伸びたりすることなく長くご着用いただけるスクール水着です。
- 【標準的カラーと幅広いサイズ展開】SunnyHugのスクール水着は、 カラーを全国共通の標準的なネイビーに合わせており、学校のプールの授業はもちろんスイミングスクールでもご使用いただいております。 水着の着用サイズも標準的なサイズをもとに110～170までと大きいサイズもご用意しております。SunnyHugのスクール水着は、 キッズから幼稚園、小学生、中学生、高校生までと幅広く着用可能です。サイズアウトの際にも是非ご利用下さい！ ※詳しいサイズの詳細は、記載のサイズ表およびモデル写真を参考下さい。
![[Formemory] 水着 女の子 セパレート 2点セット ジュニア水着 半袖 子供 スイムパンツ キッズ スクール 小学生 スイムウェア キッズ ガールズ 女子 女児 上下セット UVカット 日焼け止め 紫外線対策 水遊び 温泉 海プール (JP, 身長, 150, パープル（パンツタイプ）)](https://m.media-amazon.com/images/I/41Hc69twrtL._SL160_.jpg)
- 【商品詳細】トップス水着とスイムパンツ2点セット。上下セパレートで着こなしやすいからお着替えも、おトイレもも安心です。インナーパンツ付きで、活発な子も安心でいっぱい遊べます。サイズは110CM、120CM、130CM、140CM、150CMがあり、お子さんの体長に合わせて選ばれます。
- 【洗練されたデザイン】上下セット水着で、トップスはきれいな形と無地で、洗練とプロなどが感じられ、ファスナーも付きて着用便利です。スイムパンツと袖は柄のあるで、可愛くて活発です。色は女の子が好きなピンクとパープル2色です。パンツはインナーパンツ付きて露出防止、水遊びを楽しめる！
- 【優秀な生地】優れた肌触りのいい生地を使用していて、肌ざわりの良い質感でストレッチ性に優れ、長時間に着用しても気持ちがいいです。この水着は女の子を対象にした水着で、弾力性があり動きやすく着心地が良いです。通気性が良く、洗いやすく干しやすく、洗濯機もOKです！
- 【安全性が高い】優秀な生地染色とプリント技術を使用して、無毒無害で、この子供水着は色落ちしにくく染色せず、子供の体の安全を保護します。水着の材質は柔らかくて肌触りがよく、首元にはジッパー付き、チャックが肌に触れないようジッパーカバー付き、肌を傷つけることはなく、ゆるみが適当で着心地です。
![[ヴァニラ] ASHBERRY （アッシュベリー） キッズスクール水着 男の子用海パン セミロングタイプ[UPF50+紫外線対策加工] 130cm(855458)](https://m.media-amazon.com/images/I/41u1td+MWgL._SL160_.jpg)
- [UPF50+紫外線対策加工]で安心です！
- ■表示サイズ(対応身長)
- 110cm(105cm～115cm)総丈24cm胴幅2cm3腰幅24cm股下8cm、120cm(115cm～125cm)総丈26cm胴幅24.5cm腰幅26cm股下9cm、130cm(125cm～135cm)総丈28cm胴幅26cm腰幅28cm股下10cm、140cm(135cm～145cm)総丈30cm胴幅27.5cm腰幅30.5cm股下11cm、150cm(145cm～155cm)総丈32cm胴幅29cm腰幅33cm股下12cm、160cm(155cm～165cm)総丈34cm胴幅31cm腰幅35.5cm股下13cm、170cm(165cm～175cm)総丈36cm胴幅33cm腰幅38cm股下14cm
![[COTARON] キッズ スクール水着 女の子 ワンピース インナー付き 子供用 学校用水着 UVカット 小学生 水泳 プール (ライトブルー, 140)](https://m.media-amazon.com/images/I/31ljCcLejAL._SL160_.jpg)
- 【ワンピースタイプスクール水着】前も後ろも広めのネックラインで動きやすさも快適！定番ネイビー色にアクセントのカラーラインが可愛いデザインです◎
- 【UVカット＆シンプルデザイン】王道のスクール水着シルエットのデザインに程よい広がりのスカートをプラスした可愛いデザイン♪UVカットで日焼け対策もばっちりで安心◎
- 【着心地快適！伸縮性素材】広めの襟ぐりや脇高設計の安心デザインにプラスして、伸縮性のある生地を使用して作られており快適な着心地を実現しました！アクティブな動きでも◎◎
- 【スカート下にはショートパンツ】ふんわりミニスカートの内側はしっかりとショートパンツ設計！めくれても大丈夫なデザインでお子様も保護者様も安心です。
![[ヴァニラ] ASHBERRY （アッシュベリー） キッズスクール水着 ワンピース水着 女子用スカート＆スパッツ型 [UPF50+紫外線対策加工] 140cm(865644)](https://m.media-amazon.com/images/I/31Uj6SDMeOL._SL160_.jpg)
- 140サイズから170サイズは胸パッドがついています（取り外し可能）
- 胸元裏地の下方両脇側に胸パッドの取り出し口がございます。お気づきではない方は一度おためしください。
- [UPF50+紫外線対策加工]で安心です！
- ■表示サイズ(対応身長)
![[シメファブリック] スクール水着 男の子 ロング丈 ステッチ入り スイミング スクール 海パン 裏地付き 子供 水着 無地 小学生 中学生 キッズ ジュニア 170cm b【855503】 イエローステッチ/BK](https://m.media-amazon.com/images/I/41Y4kRq9l9L._SL160_.jpg)
- スクール水着 男の子 ロング丈 海パン ステッチ入り スクール ネイビー ブラック 紺 黒 濃紺 裏地付き 学校用 水着 子供 小学校 小学生 中学生 キッズ ジュニア 170cm 160cm 150cm 140cm 130cm 120cm スパッツ 水着 UPF50+ 男子 水泳 授業 プール スイミング
- [サイズ]：120cm・130cm・140cm・150cm・160cm・170cm（全てロング丈です）
- [素材]：ポリエステル85％・ポリウレタン15％
- [生産国]：CHINA
Last update on 2026-06-10 .
