Common Japanese Surnames: Satō, Suzuki, Tanaka and Their Kanji

The most common surnames

Surveys of Japanese surnames consistently place a handful of names at the top. Satō is widely reported as the most common, followed by Suzuki, with Takahashi, Tanaka, Itō, Watanabe, Yamamoto, Nakamura, Kobayashi and Katō making up the rest of the usual top ten. Different surveys, based on phone directories, public records or samples, give slightly different orders, especially between Itō and Watanabe, so treat the ranking as approximate.

Regional differences are strong. Some names are far more common in particular parts of the country than the national rankings suggest, and Okinawa has its own set of common surnames, such as Higa and Kinjō, which are rare elsewhere.

The next group of familiar names

Just below the top ten comes a group of names you will meet constantly in offices, schools and on television. Many repeat the same building blocks: Yoshida and Yamada use ta, Yamaguchi and Matsumoto combine nature words, and Sasaki uses the repetition mark 々 to double the previous kanji.

Saitō deserves a special mention because it is written in several variant forms, 斎藤, 斉藤, 齋藤 and 齊藤. They are all read Saitō, but each family uses its own form, and getting it right on a letter or email matters.

The kanji that surnames are built from

Most common surnames are built from a small set of kanji for landscape and place. That is because many families took or were given names describing where they lived: by the rice field, at the foot of the mountain, in the middle village. Commoners in Japan were required to register surnames in the 1870s, and many chose or were given names linked to their surroundings.

Learn these elements and you can read a large share of the names on a class list or an office floor plan. Notice that many have more than one reading depending on position in the name.

Many surnames ending in tō, such as Satō, Itō, Katō, Saitō and Kondō, use 藤, wisteria. These names are traditionally linked to the powerful Fujiwara clan, whose name begins with the same kanji, though the story of any individual family is usually impossible to trace.

Why the same kanji sound different

Two sound changes explain most of the variation. The first is rendaku, sequential voicing: when a word follows another in a compound, its first consonant often becomes voiced. That is why kawa becomes gawa in Nakagawa, ta becomes da in Yamada, and hashi becomes bashi in Ishibashi. Rendaku is not completely predictable, which is why Nakata and Nakada both exist.

The second is that 藤 has a native reading, fuji, and a Sino-Japanese reading, tō, which becomes dō in names such as Kondō and Endō. On top of this, some name kanji have readings that are almost never used outside names, and some families keep an old or regional reading. The result is that even native speakers are sometimes unsure how to read a surname.

Asking how a name is read

Because readings vary, Japanese people routinely ask about names, and it is never rude to do so politely. Business cards often print the reading in small kana or romaji, and forms have a furigana line above the name box for exactly this reason.

Use the polite forms below when meeting someone at work, and the simpler ones with classmates. Once you know the reading, repeat it back with san to confirm, and try to remember the kanji too, since you will need it for emails.

Using surnames with san, sama and kun

In Japan, adults generally address each other by surname plus an honorific. San is the default for colleagues, neighbours, shop staff and acquaintances. Sama is more formal and is used for customers and on letters and emails. Kun is often used for boys and younger men, and by some seniors for juniors at work, while chan is for children and close friends.

Never add san to your own name. When introducing yourself, just say your surname: Tanaka desu. In a business context, when speaking to someone outside your company about a colleague, many people also drop the san and say just the surname, because you are speaking about your own side.

Why the surname comes first

Japanese names follow the East Asian order: family name, then given name. Tanaka Hanako is Hanako of the Tanaka family. In speech and writing in Japanese, this order is fixed, and the given name is used mainly by family and close friends.

In English, many Japanese people have traditionally reversed their names, to Hanako Tanaka, to match Western order. The Japanese government announced in 2019 that its official English documents would use surname-first order, often with the surname in capitals, as in TANAKA Hanako. Both orders are still common in international settings, so if you are unsure which part is the surname, ask.

• Surname is myōji or sei; given name is namae or mei. Namae can also mean full name.
• Forms often have separate boxes labelled 姓 for surname and 名 for given name.
• Under current law, a married couple shares one surname, so many people change their surname when they marry.
• Estimates of how many different surnames exist in Japan vary widely, but they run to many tens of thousands.

Common mistakes and reviewing the name kanji

• Adding san to your own name. Say Tanaka desu, never Tanaka-san desu about yourself.
• Using a given name too early. Wait until you are invited; surname plus san is the safe default.
• Guessing a reading and never checking. Ask once, politely, then remember it.
• Ignoring variant kanji. 斉藤 and 斎藤 are different names to the people who carry them.
• Dropping the long vowel. Satō and Katō have a long o; saying Sato or Kato can sound like a different word to native ears.

Surnames are one of the best kanji workouts there is, because the same fifteen or so building blocks appear again and again. Review 田, 山, 川, 中, 本, 木, 村, 藤 and 橋 in Unihongo's free learning games, then test yourself on a real list, such as a class register or a set of business cards, and read every name aloud with san.