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
Mt. Fuji decorated with a 500,000-flower pink carpet is Japan’s ultimate spring view
30 Pikachus want to share a Tokyo hotel room with you that has separate Grass, Water, Fire spaces
Shrimp nuggets returning to McDonald’s Japan menu with a special surprise
New Travelling Bento pouches turn your luggage into a Japanese lunch box
Schoolkids learn life skills through shopping field trips at street markets in Kochi Prefecture
Family Mart unveils new Japanese bread that elevates convenience store food to mocchiri levels
Japanese manhole lid raises eyebrows with fertility god symbol that looks like… well, you know
Does a long line mean a sweeter deal? We compare two sweets from a Hokkaido food fair【Taste test】
Which Gundam is the favorite for fans in different countries? Gundam election announces results
Does this video about an abandoned dog leave you wiping your eyes or shaking your fist?
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Starbucks Japan closing only Shinkansen platform branch for popularity-triggered renovations
Two food hacks take Japan’s convenience store fried chicken to amazing new sandwich heights
You can assemble a well-balanced team of Pokémon, them eat them, thanks to Japanese cake chain
Tokyo turns its phone booths into free Wi-Fi hotspots, and here’s how to use them
Fading Tokyo – Searching for signs of the Showa era as local neighborhoods evolve[Photos]
Tokyo teahouse serves up a sakura matcha dessert you won’t find anywhere else
7-Eleven Japan’s new baked-in-store sweet treat is only available in three parts of the country
Man bites woman at cherry blossom park in Japan, dies shortly after
Japan now has a special desk for people who work at home with a pet cat[Photos]
Famous Tokyo cherry blossom spot installs view-blocking screens to fight overcrowding[Video]
Uniqlo announces new T-shirts for One Piece, Naruto and more for manga publisher’s 100th birthday
Train station platform ramen store closes its doors on half a century of history in Tokyo
Starbucks Japan releases new My Fruit³ Frappuccino at only 34 stores around the country
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
Krispy Kreme releases Super Mario doughnuts in Japan for a limited time
Japanese onsen egg maker from 100-yen store Daiso needs to be on your shopping list
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
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
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Japan’s newest Shinkansen has no seats…or passengers [Video]
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
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】