Bevy of busty beauties from the modeling and cosplay worlds take part in pun-based festivities.
Despite widespread popularity stretching back generations, puns and breasts are often relegated to dirty-pleasure status in many modern societies. Japan, though, remains steadfastly unabashed in its appreciation for a turn of phrase or bounce of chest, and those passions dovetailed on November 8.
Written numerically, November 8 becomes 11-8, or 11-08, if you want to use all possible digits. In Japanese, “1” can be read as i and “8” as ppai. And while it’s not an indigenous reading, you could fudge the rules a bit and read “0” as o, due to its similarity to between-N-and-P letter of the alphabet. Once you’re done jumping through all those hoops, you end up with 11-08 becoming “ii oppai, which just so happens to be how you say “nice boobs” in Japanese.
The logic was sound enough for Japanese Twitter users, and so November 8 has become Nice Boobs Day in Japanese online circles, with gravure swimsuit models kicking off the festivities with shared snapshots.
▼ Social media–savvy Jun Amaki, always ready to leap into online trends
https://twitter.com/jun_amaki/status/928102982662496256いいおっぱいの日#1mmでもいいなと思ったらRT#二次元ボディ#いいおっぱいの日 pic.twitter.com/lx0XNnphSf
— 天木じゅん (@jun_amaki) November 8, 2017
▼ Idol singer Erina Kamiya, whose breasts were last seen attempting to shatter roof tiles, karate chop-style
https://twitter.com/kamiya__erina/status/928209164957925376▼ Saki Yanase, the woman with the Pokémon chest
Speaking of Japanese animation, November 8 was also a busy day for cosplayers, who marked the occasion by posing in in low-cut anime and anime-inspired outfits.
(* ॑꒳ ॑* )#いいおっぱいの日#おっぱい揉むテンプレ
— 伊織もえ (@iorimoe_five) November 8, 2017
コラボ! pic.twitter.com/PjlT4Eb6i6
▼ Super Sonico is an obvious choice for Ii Oppai Day
https://twitter.com/HzakiK/status/928225741229002752▼ Fate/Extra’s foxy Caster
https://twitter.com/AkaneA01/status/928284629970206720Some cosplayers couldn’t decide on a single set of clothing to represent the day, instead opting to post collages.
https://twitter.com/cm_anzu/status/928198894848155649コスプレver
— 火将ロシエル (@Kasyou3roshieru) November 8, 2017
#いいおっぱいの日 pic.twitter.com/THURz3yQ3Y
Alternatively, some contributors chose to take the focus off their apparel with extreme close-ups.
1108(良いおっぱい)の日と聞いて過去画#いいおっぱいの日 pic.twitter.com/K1le0QbRct
— るしあ (@rusia_nico) November 8, 2017
#いいおっぱいの日
— まむ🕸 (@mamu12mamu) November 8, 2017
上乳と下乳
まだあった!
おやすみ💤 pic.twitter.com/obQ2ZpWufD
Due to its linguistic origins, Ii Oppai Day was mainly celebrated by Japanese models, including Tsubura and extra-tan Rina Hashimoto, the so-called “Black Diamond” of the Japanese gravure industry.
https://twitter.com/rnrn_04/status/928259064521400321#いいおっぱいの日
— 橋本 梨菜 (@rinasketch) November 8, 2017
なつのおっぱい pic.twitter.com/LhU2wseVQp
But the hashtag managed to transcend national borders as even some overseas cosplayers got in on the act.
https://twitter.com/KimbearIi/status/928425711521611776Posting one more Dangerous Beast photo for good gacha luck! 🎃#FGO #FateGO #いいおっぱいの日 pic.twitter.com/2Ub2e4yO43
— bunnie♡王女 (@bunnie_hime) November 8, 2017
because it's #いいおっぱいの日 that's why!!
— Devin 🍉 (@runDEVINrun) November 9, 2017
here repping the modest but boobiemagic crew
📸1: @MartinWongPhoto
📸2: Rale Photography pic.twitter.com/eL97hUV50R
Finally, if all this has you feeling a little overheated and you’d like to cool off, here’s illustrated character Penpen the Emperor Penguin’s take on Nice Boobs Day.
11/8日は いいおっぱいの日#penguin #ペンギン #エンペラーペンギン #今日は何の日 #いいおっぱいの日 pic.twitter.com/zASYrCRvkq
— 皇帝ペンギンのペンペン (@penguin259) November 8, 2017
Or if the origin and visuals of Ii Oppai Day have merely whet your appetite, you can enjoy a second helping of breasts and linguistics here.
Source: Hachima Kiko
Featured image: Twitter/@HzakiK

Japanese models and Internet users celebrate Twintail Day 2017【Photos】
Japanese swimsuit models and cosplayers celebrate Bikini Day 2017【Photos】
Busty Japanese model Jun Amaki shows off her fidget/boob spinner skills【Videos】
Japanese cosplayers and models celebrate Nice Knee-High Socks Day 2016【Photos】
Tokyo’s first “breast slash” cafe is opening soon
Live-action Spirited Away stage play announces world tour with first-ever U.S. and Canadian dates
Sanrio Character Poll announces winners, Hello Kitty absent from top 10 in many countries
Japanese man’s gross conveyor belt sushi social media prank video gets him a 500,000-yen fine
Studio Ghibli combines anime and craftsmanship in new Totoro and Jiji Gobelin tapestry bags
Pikachu brings electric style to brand-new Pokémon G-Shock watch featuring every stater trio
Blind Tokyo commuter explains the easiest place for him to stand while riding the train
Mt Fuji installs new emergency shelters ahead of the 2026 climbing season
Tokyo has only two barley tea makers, and we visited one to see how mugicha is made
Taco Spaghetti appears in Japan, and our taco fan rushes to try it[Taste test]
Here’s what Shibuya’s famous scramble intersection looked like after the Japan vs. Sweden match
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
Japan launches first overnight Shinkansen bullet train between Tokyo and Osaka this summer
Family Mart Japan installs red-eyed “Monster Wolf” to keep bears away from convenience store
Starbucks Japan creates special drink bottle bags, adorable stickers for all 47 prefectures[Pics]
Starbucks Japan reopens Shinkansen platform store after redesigning it for speed
Japanese sweets brand creates new drinkable Cigare and we’re totally here for it
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Studio Ghibli store Donguri Republic announces opening of first-ever store in America
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
Uniqlo reveals third round of massive 100-year-anniversary manga T-shirts for Jump’s Shueisha
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
Japanese sweets shop sells an ohagi so exquisite it sells out by noon
New official Ghibli anime food cookbook will teach you how to make Ponyo’s ramen and more
Forget Tokyo go-karts – there’s a new way to sightsee on four wheels in Japan
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Busty cosplay: The quickest way to revive interest in a completed anime series 【Photos】
POOP: Pen Oppai (Breast) Oppai Pen conceived online 【Video】
Busty cosplayer makes Japanese dreams come true with super real Super Sonico cosplay 【Photos】
Cosplayers and models share selfies to celebrate Bikini Day in Japan
Famous manga artist gives out advice on how to draw breasts to celebrate Boob Day
Weekly Playboy Japan celebrates its 50th anniversary with a 50-model bikini photo shoot 【Video】
Japanese company puts up signs banning one specific style of intercourse, for coronavirus safety
Japanese gravure idol has a fishy secret to share in her bathroom 【Photos】