
10 years after legally giving up his Sato-hood, would he make the same choice again?
There was a time when the vast majority of people in Japan didn’t have family names. During the feudal era, surnames were for the exclusive use of the nobility and warrior classes, so if you weren’t a local lord or samurai, you had only your given name to go by. It wasn’t until the late 19th century, when the Meiji restoration brought about a rapid modernizing of Japanese governmental systems, that regular Joes and Janes (or Taros and Hanakos) were finally permitted to have family names too, with the passing of the Order Permitting Commoner Surnames in 1870 on September 19, which has now joined the ranks of Japan’s quasi-holidays as Myoji no Hi, or “Surname/Family Name Day.”
However, while everyone in Japan has been allowed to have a surname for 155 years now, there are still some restrictions in place. For example, if Hanako and Taro get married, and she wants to continue using her maiden names in a legal capacity (i.e. on their driver’s license, credit cards, contract paperwork, etc.) while he continues using his own, the Japanese government says that’s not OK. That might sound incredibly sexist, but the rule isn’t that women have to take their family’s name, it’s that Japanese-citizen married couples have to have the same family name.
In practice, the majority of women in Japan do end up taking their husband’s surname when they marry, but the opposite scenario isn’t shockingly unusual. There’s even a phrase for it: “Muko ni naru” literally translate to “Become a son-in-law,” but is used to describe the situation in which a man who’s getting married takes his wife’s surname instead.
Longtime readers might recall that we talked about this a while back in regard to SoraNews24 crack reporter Mr. Sato…who technically isn’t Mr. Sato at all, or at least not anymore. Since exchanging vows with his lady love, he’s now legally Mr. Yamashina.
▼ The driver’s license of Hidenori Yamashina (山科英典)
The most common impetus for a man taking his wife’s family name is her not having any brothers. With no sons in the family, the surname would die out if the daughters all took their husbands’ surnames, and so having the groom muko ni naru can extend the family’s name until at least the next generation, should the couple have children.
For Mr. Sato, the decision to take his wife’s name wasn’t one he agonized over. “Sato” is already the most common surname in Japan, and since he himself has a brother, it’s not like he’d be bringing an end to his family’s Sato heritage either. It’s now been 10 years since he legally became Mr. Yamashina, though, so looking back, does he regret that choice?
Let’s start with the biggest negative: Changing his surname was a massive hassle. Driver’s license, bank accounts, credit cards, insurance registries, apartment leases, passports – all of those, and more, require separate processing when you change your name. Some steps require you to come into a government office or customer service counter in-person, and others insist that you do them online. It was a huge drain of time and energy, on a scale that he never wants to go through again.
However, those are all inconveniences that, if he hadn’t gone through them in the process of becoming Mr. Yamashina, his wife would have had to in order to become Mrs. Sato, so collectively for the couple, it’s not really any worse an option than her taking his family name. It’s also worth taking into account that Mr. Sato and his wife didn’t start their courtship as high school sweethearts. By the time they met, they both already had the sizable collections of name-bearing records and documents that accumulate as one progresses into mature adulthood, so Mr. Sato probably had more to do than a younger man taking on his wife’s family name might.
▼ By the way, in order to avoid confusion with long-term associates it’s not so unusual for Japanese people who take their spouse’s surname to continue using their own for work-related conversations and correspondence, since first names are rarely used in formal business settings, so in the office and when he’s out on assignments, he’s still “Mr. Sato.”
OK, so what about the positives? Mr. Sato says:
“The best thing about taking my wife’s family name is the feeling of joy I got from it symbolizing that we were going to spend out lives from now on together. It gave me a sense of determination, or I guess maybe you could call it resolve, a feeling of strength that we were going to share our lives with each other.”
Ultimately, within the current framework of what’s allowed under Japanese law, Mr. Sato feels the choice of whether the couple should use the wife’s surname is something for each individual couple to decide for themselves, based on their relationship and situation. For him, though? “I’ve never thought ‘I should have stayed Sato,’ since the joy it’s brought me is far greater than any of the drawbacks.”
Photos ©SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]



Should people in Japan be allowed to keep their surnames after getting married, survey asks
Japan Supreme Court rules it’s constitutional to require married men and women have same surname
SoraNews24’s Mr. Sato reveals the shocking truth: He’s not really Mr. Sato!
Government statistics reveal the most common Japanese surnames, makes Mr. Sato sad
Everyone in Japan will be Mr. or Mrs. Sato by 2531, according to study
Japanese vending machine sells freshly squeezed lemon juice with a futuristic light show
Coco’s Japan is very confident in their chilled ramen, but should they be? [Taste test]
Air-conditioned dress shirts arrive in Japan to save working professionals from sweltering heat
Tokyo’s Haneda Airport airlines announce stricter luggage check-in deadline for domestic flights
Studio Ghibli’s No Face twirls to sound of Spirited Away’s theme song in beautiful accessory box
Pokémon comes to McDonald’s Japan for new Happy Meals toys, brings every generation’s starters
Is covering your entire upper body with cooling strips enough to fend off Japan’s summer heat?
Pokémon Center Online designates first Pokémon items that will require Japanese ID card to buy
7-Eleven Japan rethinks convenience store sandwiches with a wild new choc-mint variety
Sanrio characters join forces with your favorite Japanese snack mascots as prizes at Family Mart
Tokyo’s newest viral dessert is like a Japanese parfait inside a bread bun [Taste test]
Starbucks Japan releases first-ever gacha capsule toys, featuring iconic menu items as plush coffee charms
7-Eleven Japan adds new chocolate fruit gummies to its sweets range, but are they worth the hype?
Kyoto receives more foreign tourists than ever before, but fewer visitors say they’ll return
7-Eleven Japan now offering baked-in-store pizza by the slice with two very different topping sets
Starbucks Japan opens new store inside historic seaside quarantine station near Tokyo
Foreign tourists in Japan eat far more rice than previously thought, according to new data
Studio Ghibli has a new anime out, and there’s only one place in the world where you can see it
Tokyo subway installing new ticket gates that don’t accept payment through Suica or other IC cards
Japan now has human refrigerators inspired by Japanese vending machines
Hatsune Miku collaborates with Hokusai’s art in new Vocaloid ukiyo-e illustration series [Pics]
New Shinkansen luggage drop-off system begins in Japan, making train travel even easier
Studio Ghibli releases anime T-shirts that pay homage to one of Hayao Miyazaki’s most personal films
Family Mart opens new “Famima” flagship store in Tokyo that’s like a tourist attraction
Uniqlo looks back to the very start of Pokémon with new black-and-white pixel art T-shirts[Pics]
Japanese Shinkansen becomes an overnight hotel for three nights this summer
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
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
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
Should married couples in Japan be allowed to have different family names? Survey investigates
Japan: one of the few countries in the world where married couples must have the same surname
Mr. Sato’s dad gives him some tough love when asked if he knows what his son does for a living
Mr. Sato marries a handsome anime man in VR at Tokyo Game Show 2017
The proper response when your wife says “I can’t make dinner tonight?” Japanese Twitter debates
March 10 was Sato Day in Japan, so here are five wonderful things about our own amazing Mr. Sato
“Family name researcher” discovers the most common full name in Japan
Mr. Sato takes on Family Mart’s “All-You-Can-Eat Convenience Store Challenge!”
Mr. Sato travels five hours to the Oki Islands to make amends for a 17-year grievance【Photos】
Field Ration Stamina Rice Bowl from the JSDF Family Mart is so good Mr. Sato wants to enlist
Be Mr. Sato’s online friend, and he might take you to dinner, like he did with these foreign fans
Company uses photos of Mr. Sato in letters to customers, so he pays a visit they won’t forget
New Uniqlo concept store opens in Shinjuku, so Mr. Sato gets himself a new workout outfit
Mr. Sato is sorry for not taking your compliment well
Mr. Sato compares the new milk cream Hokkaido cheese steamed cake to the classic version