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:
- (✪‿✪)【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】。
- (✪‿✪)【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】。
- 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)
- 素材構成: 82% ポリエステル, 18% ポリウレタン 【セット内容】・3点セット水着・ラッシュガード ・ハーフパンツ ・レギンス 三角形幾何学柄がクール、レギンスのロゴもカッコよさに磨きUp!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。
- 【紫外線対策】紫外線からお肌を守る!嬉しい長そで、長そででしっかり紫外線対策、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。ビキニ焼けの心配なし、日焼け止めの節約にも。お肌の露出を抑えて水着の跡が くっきり残らないのが嬉しい、也可作为中暑对策使用! 配有防雨罩和遮阳罩、您可以更加享受大海和游泳池!
- 【ウエスト調節】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!お洋服感覚でお着替え!シャツのように上からすぽっと被るだけ!一人でも着替えやすい。
- 【適用場合】アウター&レギンスつきのフルセットが嬉しい可愛くてオシャレなキッズ水着の登場!カラバリ豊富でお友達や家族とお揃いコーデも楽しめます。 買ってすぐ使えるすぐにフルセットで色々買い揃えたりする手間がないのが嬉しい!海やプールだけでなく、水辺での遊び、レジャーなど様々なシーンで活躍間違いなし! 長袖アウター&レギンスで怪我防止&日焼け防止になるので、外で遊ぶお子様にピッタリ!全部着用するのも良し、レギンスなしでカジュアルに着てみたり男の子はショートパンツのみの着用でも着て頂けるので着こなし&着回し自由自在! 飽きがこないシンプルデザインなので遊びだけでなく、水泳教室やレッスンの場にも最適です。しっかりした生地感で、水陸両用なのも嬉しいポイント! ストレスフリーなノンワイヤーなのでアクティブなシーンでも動きやすく快適です。 全タイプ、男女問わず着て頂けるので、是非お好みのカラーを選んで下さい!
- 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。
- [ストレッチ素材] 透けの心配もない厚さで安心感もある素材で優れて長持ち、しっかりとした伸縮性がある高品質生地で縫製され、通気性も良い、子供のお肌に優しい品です。フロント部分の生地が二重に、もっと安心!
- [可愛いデザイン] キャンディのような色合いと海洋生物をテーマにしたプリントでかわいらしく爽やかな印象を与えます。夏海とぴったり♫
- [快適] 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!ママもらくらくHAPPYな上下セパレートタイプ。5XLはジュニア用の差し込みカップ付きで、お年頃の女の子も安心してご着用していただけます。
- [夏のトレンド] 暑い夏の絶品、自由に海の中で輝く。お嬢さんに喜ばれる最高のプレゼント。海やプールだけでなく、スイミングスクールや温泉にも最適。「かわいい」と「楽ちん」の両立が叶う水着は、夏旅にぴったり◎ぜひお気に入りの水着と一緒に、この夏を思い切り楽しんでくださいね!
Last update on 2025-09-21 .