Anything that gets published is prone to typos at any stage of the process, and manga is no exception. From using the wrong kanji to misprinting page numbers, any number of mistakes can happen. Readers haven’t always proved to be understanding of these, but when it comes to a matter very dear to many hearts — bra sizes — errors can be especially unforgivable.
Ansatsu Kyōshitsu, a popular manga in Weekly Shonen Jump about a classroom being trained in the art of assassination by a tentacled alien teacher, recently included a list of students along with their bra sizes. Among these, Sumire Hara was listed with a C-cup and Rinka Hayami with a D-cup. Several readers pointed out how implausible it was that Rinka could actually have breasts that large. Sure enough, on March 18, the official Ansatsu Kyōshitsu Twitter account posted a correction to the list: the bra sizes of Sumire and Rinka had been switched. Sumire was supposed to have a D-cup and Rinka a C-cup. The account apologized for the error and promised to correct the mistake in tankoubonprintings. It also advised Rinka fans who refuse to accept that she has a C-cup to cut out the original page and save it.
Some fans reacted on Twitter with consternation. “This is a grievous error,” “This is too important,” and “This is horrible” were among the responses. @wamtst was not surprised, considering that Rinka would have trouble shooting with a D-cup. He or she also wondered what Nagisa’s size is (Nagisa is a male character, albeit a rather androgynous one).
If you’re curious what the other characters’ bra sizes are, the list singles out Rio Nakamura (D), Kirara Hazama (A), Yuzuki Fuwa (B), and Touka Yada (E).
It’s worth noting that US bra sizing and Japanese/European bra sizing is slightly different; a US A cup corresponds to a Japanese/European B cup, while a US B cup corresponds to a Japanese/European C cup, and so forth. Those interested in a more interactive demonstration can play around with this online international bra size converter.
Sumire is the character in the back holding knives. Rinka is on the left.[Via Hachima Kikou, Netlab and Gadget Tsuushin; Images from JoJoLion + Ansatsu Kyoushitsu Channel! and Assassination Classroom Wiki]
More from Anime News Network



Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
Don’t judge this Kiki’s Delivery Service book by its cover, because it’s not actually a book!
The quest for Dragon Quest Yoshinoya figure sets: Worth taking for fans, tricky for scalpers[Pics]
Japan triples departure tax, foreign tourists and locals now must pay more to leave country
Udon pudding is about to shake up the noodle scene in Japan
Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
Don’t judge this Kiki’s Delivery Service book by its cover, because it’s not actually a book!
The quest for Dragon Quest Yoshinoya figure sets: Worth taking for fans, tricky for scalpers[Pics]
Japan triples departure tax, foreign tourists and locals now must pay more to leave country
Udon pudding is about to shake up the noodle scene in Japan
How to cook shiitake mushrooms like a Japanese manga character
Starbucks Japan teams up with Converse Tokyo for a new limited-edition collection in honour of Tanabata
One Piece docking at Round 1 amusement centers in both Japan and the USA
Studio Ghibli releases a musical diorama based on a touching anime scene from My Neighbour Totoro
Japanese overnight sightseeing train returns for summer with ramen stops and ocean views
Sanrio Character Poll announces winners, Hello Kitty absent from top 10 in many countries
Live-action Spirited Away stage play announces world tour with first-ever U.S. and Canadian dates
Tokyo has only two barley tea makers, and we visited one to see how mugicha is made
Blind Tokyo commuter explains the easiest place for him to stand while riding the train
Sleep at Hoshinoya Nara Prison, one of the most unique hotels in Japan
Pikachu brings electric style to brand-new Pokémon G-Shock watch featuring every stater trio
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
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
Japan launches first overnight Shinkansen bullet train between Tokyo and Osaka this summer
Japanese sweets shop sells an ohagi so exquisite it sells out by noon
Forget Tokyo go-karts – there’s a new way to sightsee on four wheels in Japan
Japanese sweets brand creates new drinkable Cigare and we’re totally here for it
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]
How to cook shiitake mushrooms like a Japanese manga character
Starbucks Japan teams up with Converse Tokyo for a new limited-edition collection in honour of Tanabata
One Piece docking at Round 1 amusement centers in both Japan and the USA
Studio Ghibli releases a musical diorama based on a touching anime scene from My Neighbour Totoro
Japanese overnight sightseeing train returns for summer with ramen stops and ocean views
KFC Japan creates spicy summer fried chicken chips together with Calbee
Sanrio Character Poll announces winners, Hello Kitty absent from top 10 in many countries
Taco Spaghetti appears in Japan, and our taco fan rushes to try it[Taste test]
Sanrio’s new McDonald’s Japan Happy Meals give the spotlight all to Cinnamoroll[Photos]
Foreign resident of Japan arrested after spraying bear repellant inside post office
Blind Tokyo commuter explains the easiest place for him to stand while riding the train
Sanrio collaborates with Sesame Street for adorable merch and sweets in Japan[Photos]
Why you shouldn’t feel guilty about using manga for studying and the top series for learning