Japan’s birth rate has been dropping for decades now, and while it’s possible the demographic shift is a result of couples just getting that much better at using contraceptives, you have to allow for the possibility that fewer babies is due to fewer couples doing the deed.
Lending further credibility to this explanation is the fact that the proportion of Japanese men in their 30s who still have their virginity has gotten so high that society has coined a new slang term to describe them: yaramiso.
According to a survey done in 2012 by Japan’s National Institute of Population and Security Research, almost 25 percent of men between the ages of 30 and 34 have never had sex. A separate set of data, compiled by the Ministry of Land, Infrastructure, and Transport, and Tourism, showed that as recently as 1995 only 10 percent of the men in this age set were virgins.
You can always count on the Japanese government to think up impressively long organizational names while carefully tracking national boning patterns.
With nearly one in four men in their early 30s having never gone all the way, the number of the group’s members has grown so large that a new term has sprung up to describe them, yaramiso.
As part of our continuing quest to impart our readers with all the PG-13-rated Japanese vocabulary your textbooks won’t teach you, let’s talk about the origins of the word.
First, there’s the word suru. Suru is a useful word to know, since it means “do” and is one of the most commonly used verbs in Japanese. Suru has a rougher-sounding cousin, though, yaru, which also means “do,” but has a bit of a harsher, aggressive tone to it.
The conventions of Japanese mean you don’t always have to use a grammatical object. For example, yomu means both “read,” and “read it.” And so, just saying yaru can mean “do it”, as in “do it.” And we don’t mean your taxes, unless you have some very peculiar fetishes.
“Hey baby, I was thinking, since it’s our anniversary, we could get freaky and try something other than the standard deduction.”
If we tweak the suffix of yaru just a bit, we get yarazu, meaning “not doing (it).”
Moving right along, the normal way to say “30 years old” is sanjuusai. Unfortunately, the Japanese language is a little like a sullen teenager in that it flip flops on whether it wants to be understood or just frustrate you until you give up trying to communicate entirely, and so of course there’s also a less common, more archaic way to say “30 years old,” misoji.
We suppose you could just insert the first word into the second and get yarazu misoji, but who has time for a whole six syllables when you could shorten it down to the hipper yaramiso, or a person who hasn’t done it in his 30 years.
30 birthday cakes, no adult sleepovers
Some have pointed out that the sudden surge in the use of yaramiso comes roughly ten years after the first time they heard people call someone yarahata, an abbreviated form of yarazu hatachi or “virgin in his 20s.”
With an eye to the future, some are already proposing yarashiso for those who get past the 40-year mark without getting it on. Time will tell if it catches on, since there’s always the chance that all those late-blooming 30-year-olds will find their special someone in the next 10 years. For now, here’s what Japanese Internet commentators are saying about yaramiso.
“Can’t you just call them men who’re virgins?”
“So does this make them miso boys (in reference to “cherry boy,” a slang term for a young male virgin)?”
“I think they’re all satisfied just with watching porn.”
“Just leave me alone, already.”
“They’re better than guys who sleep around, so I think we should stop with the cheap-shot name-calling.”
“Guys who have their first time with a prostitute are the really pathetic ones.”
Our personal favorite comment about the term, though, was this quip:
“It sounds like the name of a Pokémon.”
We have to agree, although having been created in 1996, Pikachu still has 12 more years until he evolves into a yaramiso.
Source: Hachima Kiko

Why Japanese doesn’t need swear words
The Secret Slang of Japanese Cabbies
Five Japanese sign language phrases with interesting reasoning behind them
Survey about Japanese teens’ first sexual experience tries to draw line between “love” and “love”
Saitama is home to the best strawberries in Japan that you’ve probably never even heard of
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
Ghibli’s Kiki’s Delivery Service returns to theaters with first-ever IMAX screenings and remaster
Highest Starbucks in Japan set to open this spring in the Tokyo sky
Family Mart’s Shibuya Cat Street shop hosts first-ever rescue cat photo exhibition for Cat Day
Skyscraper sized Pokémon cards to appear in Tokyo all year long in Tocho projection mapping event
Japan has only one airport named after a samurai, so let’s check out Kochi Ryoma【Photos】
Boro the Caterpillar anime now showing at the Ghibli Museum in Tokyo 【SoraReview】
What does a kanji with 12 “kuchi” radicals mean? A look at weird, forgotten Japanese characters
Totoro, Catbus sleeping bags are perfect place to stay cozy all winter…if you fit inside【Pics】
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Is Sapporio’s Snow Festival awesome enough to be worth visiting even if you hate the snow? [Pics]
Japan has trams that say “sorry” while they ride around town…but why?
Tokyo Skytree turns pink for the cherry blossom season
Japan’s new “Cunte” contact lenses aren’t pronounced like you’re probably thinking they are
Shibuya Station’s Hachiko Gate and Yamanote Line stairway locations change next month
Yakuzen ramen restaurant in Tokyo is very different to a yakuza ramen restaurant
Starbucks Japan adds new sakura Frappuccino and cherry blossom drinks to the menu
Japan’s newest Shinkansen has no seats…or passengers [Video]
Foreigners accounting for over 80 percent of off-course skiers needing rescue in Japan’s Hokkaido
Super-salty pizza sends six kids to the hospital in Japan, linguistics blamed
Starbucks Japan unveils new sakura Frappuccino for cherry blossom season 2026
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
Naruto and Converse team up for new line of shinobi sneakers[Photos]
Is China’s don’t-go-to-Japan warning affecting the lines at a popular Tokyo gyukatsu restaurant?
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
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
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
Is Japanese language becoming less discriminatory towards women?【Women in Japan Series】
Japan has a set phrase for the crazy busy feeling we all get at the start of the year
Should a man in his 40s pursue a 19-year-old Japanese convenience store clerk?
Why Does Engrish Happen in Japan? 30-year-old fart-related signage mistake edition