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:
![[Teddy] キッズ 水着 男の子 長袖ラッシュガード 短パン 水泳帽子 3点セット 子供用 紫外線対策 kids395 (B：ホワイト, 4T(90cm))](https://m.media-amazon.com/images/I/419bbL4B6VL._SL160_.jpg)
- セット内容・3点セット・ラッシュガード・ハーフパンツ・スイムキャップ 水着選びで迷わず楽にコーデ♪素敵な柄で楽しい夏の思い出に。小学生 ジュニア 男児 上下セットアップ かっこいい 【商品詳細】・ジッパー：プラスチック・ウエスト調節：紐あり・金属パーツ：あり（アジャスター部分）・プラスチックパーツ：なし
- Size 4T(90cm) 参考身長 85-95 着丈 40 身幅 28 ゆき丈 45 ウエスト 41-49 A：パンツ丈 30 B：パンツ丈 25 頭周り 44
- point01紫外線からお肌を守る！ママも安心でHAPPY♪お子様のデリケートな素肌を日焼けからばっちりガード◎
- point02お着替えもおトイレも楽々上下セパレート◎お着替えもおトイレも自分で出来ちゃう！？ママも楽らく♪
![[WindTour] キッズ 水着 男の子 セパレー 3点セット【長袖ラッシュガード+レギンス＋ショートパンツ】スクール水着 男子 上下セット 子供水着 水泳パンツ スイムパンツ スイムウェア ラッシュガード キッズ UVカット 130 140 150 160 (150, ファスナー付き-三角形-グリーン)](https://m.media-amazon.com/images/I/41bCIfxDD5L._SL160_.jpg)
- (✪‿✪)【3点セット セパレート水着 ２タイプ】 ラッシュガード＋レギンス＋ショートパンツのセパレート水着3点セットとなります。別々に買う必要なく、一括に解決！とても便利で嬉しいです。ラッシュガードはファスナースムーズに開閉できる前開きデザインとＴシャツのように頭からすぽっと被るの2タイプあります。上下セットなので、お子様一人でも脱着しやすいし、トイレの時も楽々で安心できます。
- (✪‿✪)【UVカット 日焼け対策 虫対策】UVカット生地を使用しており、長袖ラッシュガード＆レギンスで肌の露出を控え、有害な紫外線を有効的に遮断、お子様の敏感な肌を守ります。手首や足首までしっかりカバーするタイプなので、紫外線対策である同時に虫刺されやクラゲ対策、擦り傷防止など対策にもなります。
- (✪‿✪)【優れた伸縮性 吸湿速乾性】高伸縮生地を採用なので、フィット感たっぷり！水遊びやスポーツなど激しく運動しても締め付け感なく、自由自在の快適さを実現します。ドライ繊維追加で、吸湿速乾効果、汗かいても、濡れてもサラサラの肌触りがネバネバ感なありません。使用感最高のキッズ水着です。
- (✪‿✪)【カラバリ豊富 サイズ説明】多色ありますので、お子様自分の好みによって選択できるのはポイントになります。3点セットに使用しても別々に使用してもOK着回し自由自在な子供水着です。お友達や家族とお揃いコーデも楽しいです。サイズ：【130/3XL推薦身長130-140cm、推薦体重27-32kg、推薦年齢8-9歳】;サイズ：【140/4XL推薦身長140-150cm、推薦体重32-40kg、推薦年齢10-11歳】;サイズ：【150/5XL推薦身長150-160cm、推薦体重40-47kg、推薦年齢12-13歳】;サイズ：【160/6XL推薦身長 160-165cm、推薦体重 47-60kg、推薦年齢14-15歳】。
![[WindTour] 水着 女の子 セパレート スクール水着 女子 上下セット 子供 キッズ ラッシュガードセット スイムウェア ガールズ セパレート【長袖ラッシュガード +レギンス＋ショートパンツ】UVカット 130 140 150 160(150/5XL, ファスナーなし-木の葉-ホワイト)](https://m.media-amazon.com/images/I/41+APU5z92L._SL160_.jpg)
- (✪‿✪)【3点セット セパレート水着 ２タイプ】 ラッシュガード＋レギンス＋ショートパンツのセパレート水着3点セットとなります。別々に買う必要なく、一括に解決！とても便利で嬉しいです。ラッシュガードはファスナースムーズに開閉できる前開きデザインとＴシャツのように頭からすぽっと被るの2タイプあります。上下セットなので、お子様一人でも脱着しやすいし、トイレの時も楽々で安心できます。
- (✪‿✪)【UVカット 日焼け対策 虫対策】UVカット生地を使用しており、長袖ラッシュガード＆レギンスで肌の露出を控え、有害な紫外線を有効的に遮断、お子様の敏感な肌を守ります。手首や足首までしっかりカバーするタイプなので、紫外線対策である同時に虫刺されやクラゲ対策、擦り傷防止など対策にもなります。
- (✪‿✪)【優れた伸縮性 吸湿速乾性】高伸縮生地を採用なので、フィット感たっぷり！水遊びやスポーツなど激しく運動しても締め付け感なく、自由自在の快適さを実現します。ドライ繊維追加で、吸湿速乾効果、汗かいても、濡れてもサラサラの肌触りがネバネバ感なありません。使用感最高のキッズ水着です。
- (✪‿✪)【カラバリ豊富 サイズ説明】多色ありますので、お子様自分の好みによって選択できるのはポイントになります。3点セットに使用しても別々に使用してもOK着回し自由自在な子供水着です。お友達や家族とお揃いコーデも楽しいです。サイズ：【130/3XL推薦身長115-125cm、推薦体重20-25kg、推薦年齢8-9歳】;サイズ：【140/4XL推薦身長125-135cm、推薦体重26-33kg、推薦年齢10-11歳】;サイズ：【150/5XL推薦身長135-145cm、推薦体重30-40kg、推薦年齢12-13歳】;サイズ：【160/6XL推薦身長145-155cm、推薦体重40-50kg、推薦年齢14-15歳】。
![[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, 130, ライトブルー)](https://m.media-amazon.com/images/I/31o-GmdYa3L._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。
![[Emfay] キッズ 水着 男の子 サメ柄 キャップ付き３点セット ラッシュガード 長袖 (110（100-110cm）)](https://m.media-amazon.com/images/I/51JTIKkwXAL._SL160_.jpg)
- サメ柄の海パンにラッシュガード水着セット。
- しっかりとした伸縮性のある生地と丁寧な縫製で、元気に動きまわるお子様にも安心。
- ソフトで伸縮性の高い生地を使用したボーイズ水着。フィットして泳ぎやすい。
- セット内容：長袖ラッシュガード、パンツ、キャップ
![[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。
Last update on 2025-10-18 .
