For fans of two-piece swimwear, it’s like Christmas in July.
Japan has one official holiday in July. Marine Day, or Umi no Hi as it’s called in Japanese, is held on the third Monday of the month, and is a nice midsummer excuse to blow off work and head down to the beach.
There’s another day of celebration during the month, though. On July 5 Bikini Day marks the date when the world’s first bikini was unveiled back in 1946. Bikini Day may not be an exclusively Japanese observance, but given the country’s unabashed love of sexy fashion, it’s especially popular among models in Japan, particularly those in the gravure/gurabia genre who specialize in revealing outfits.
As such, July 5 say a flurry of bikini-related social media posts in Japan, with models such as Yu Kanawa…
おはゆう〜☆今から71年前の7月5日、パリのファッションショーでビキニが初登場した日だそうです👙という事でビキニかわにゅ(๑╹ω╹๑ )今日も一日頑張りまっしょーい！ https://t.co/eVMGEHdkML—
川奈ゆう★7月8日バースデーイベント♡ (@kawanayu198473) July 05, 2017
尾崎礼香(おざきあやか) (@reikaya66) July 05, 2017
…and Megumi Okamura, who’s also a vocalist attached to uniformly busty idol unit KNU, sharing swimwear snapshots.
岡村めぐみ👓(KNU) (@o_megumi14) July 05, 2017
天木じゅん (@jun_amaki) July 05, 2017
…but is, in fact, her bikini bottom worn on her chest and the top on her hips.
While some contributors, like Kie Inoue (also of KNU) took the opportunity to tweet fresh photos…
井上貴惠（KNU） (@kieinoue) July 04, 2017
, others took the “greatest hits” approach, sending out composites from multiple bikini-wearing sessions, such as these from Yuno Mizusawa…
ビキニの日ーー！！！カンカンカーン！！！！ビキニーー！！！ #ビキニの日 #グラドル自画撮り部 https://t.co/U8KL2Blpmv—
水沢柚乃 (@mizuyuno_) July 05, 2017
…and Aimi Sekiguchi.
#ビキニの日 らしいですね。スマホのフォルダ遡って最近全然水着着てない事に気付いた。。 https://t.co/JFZWfV6ojs—
せきぐちあいみAimiSekiguchi (@sekiguchiaimi) July 05, 2017
Bikini Day was accompanied by more of a flurry of activity on Twitter than Instagram, but some also took to the photo-sharing site to take part, such as Yu Momose.
The day was also a popular time for selfies, though Nana Sakuragi…
桜木 なな(関西弁) (@nana_sakuragi) July 05, 2017
…and Hikaru Aoyama seem to have had some trouble keeping their faces in frame…or simply assumed their fans’ eyes were going to be drawn elsewhere anyway.
あ、貼ります← #グラドル自画撮り部 #深夜の #突然の投下 #おやすみ #こう見ると迫力あるね #写真って怖い https://t.co/YOlscw9puF—
青山ひかる@あおみん(あお松) (@hikaru06kon) July 04, 2017
Bikini Day doesn’t lend itself all too easily to cosplay, seeing as how many bikini designs have only the bare minimum of fabric to work with. Still, dedicated fans managed to dress up as KanColle’s anthropomorphized American battleship Iowa…
今日は #ビキニの日 なのね！🇺🇸🇺🇸🇺🇸 アイオワで星条旗ビキニ⭐ https://t.co/BvfFpjlWHi—
桃色れく♥ももれく (@momoreku) July 05, 2017
…Super Sonico (who basically wears a bikini 365 days a year anyway)…
ビキニの日 その2 今日は個人撮影行ってくるね♪ #ビキニの日 #ビキニスタイルの日 #すーぱーそに子 #そに子 #コスプレ https://t.co/pA7IHp1Grh—
愛沢リフ@個撮募集中&写真集通販中 (@Rifu_PR) July 05, 2017
…and Fate/Grand Order’s Sukasaha/Scathach…
サク＠1日目あ27b (@saku93) July 05, 2017
Speaking of Sukasaha, she also got a 2-D Bikini Day salute…
sendo (@sendrawz) July 05, 2017
…as did Re:Zero’s Rem.
今日はビキニの日らしいので、色っぽいレムりんです #ビキニの日 https://t.co/LGuVsJuuHI—
らぐほのえりか＠すくりぞ1巻出ました (@ragho_net) July 04, 2017
Even bikini armor showed up in the festivities.
▼ Leda’s Yoko and Valis’ Yuko? It’s an ‘80s anime-style swordswoman nostalgia overload!
#ビキニの日 蘇れ！ビキニアーマーの戦士達よ！！ https://t.co/UCMskHjWlY—
komugi (@komugi_k) July 05, 2017
Bikini Day has officially come to an end in Japan, where it’s now July 6, but the celebration continues on social media where photos continue to trickle in with the hashtag #ビキニの日.