The all-purpose word for ‘friend’ is (tomodachi). Use it for anyone you’d call a friend in English — classmates, coworkers you hang out with, neighbors you’ve gotten close to.

A quirk of

Despite ending in (a pluralizing suffix), can mean one friend OR multiple friends. Context tells you which. can be ‘a friend came’ or ‘friends came’. For explicit plural, some speakers say , though purists call that redundant; most rely on context.

A related grammatical note: as a suffix only attaches to people ( is an exception since is fused into the word itself, but ‘us’, ‘children’ work this way). You don’t say for ‘dogs’ — that would sound odd.

Japanese separates closeness more sharply

In English, ‘friend’ covers a huge range — from ‘someone I met twice’ to ‘the person I’d call from a hospital bed’. Japanese spreads this across more vocabulary, and using the wrong level can over- or under-claim the relationship:

  • (shiriai) — acquaintance. Someone you know, but no friendship claim. ‘A contact from work’ fits here.
  • (tomodachi) — friend. The everyday relationship.
  • (naka no ii tomodachi) — close friend. Friends you actively want to see.
  • (shin’yū) — best friend. Reserved for the one or two deepest friendships in your life.

Calling someone carries real weight — it’s not tossed around casually. A Japanese person might take years of friendship before calling someone out loud. Using it casually about a new friend can come across as naïve or presumptuous.

Register: vs

In formal contexts — job applications, eulogies, professional correspondence, a wedding speech — is the right word. sounds too casual for a job application. In conversation, the reverse: sounds stiff, and is natural.

Quick test: if you’d reach for ‘friend’ in English, use . If you’d reach for ‘associate’ or ‘longtime companion’, consider .

The phenomenon

Japanese has a dedicated word — (osananajimi) — for a friend you’ve known since childhood. This is not a common English category; we say ‘childhood friend’ but it’s multiple words. In Japanese pop culture, is a whole trope: romance-eligible characters in anime and manga often start as , and the word carries associations of long-standing emotional bonds and predetermined intimacy.

Gendered friendship vocabulary

A few friendship words have gender associations:

  • (dachi) — mostly male. Shortened slang . A woman using sounds deliberately tomboyish or rough.
  • (aibō) — ‘partner/buddy’. Gender-neutral but carries a slightly masculine-coded detective-drama flavor.
  • (sōrumeito) — ‘soulmate’ loanword, mostly used by women in emotional contexts.
  • BFF and — English-borrowed, mostly used by younger women; sometimes ironic.

Cultural notes on friendship

Japanese workplace friendships rarely spill into the personal sphere the way Western ones can. Coworkers you see daily for years may never be called — they stay (dōryō, colleagues) unless explicit personal activity develops. This isn’t coldness; the categories are just more clearly delineated.

Similarly, ‘making a new friend’ in Japanese social life often moves slowly — casual acquaintance → repeated meetings → a shared meal or activity → then the shift where you might start calling each other . Declaring someone too early can sound presumptuous.

Related expressions

  • (yūjō) — ‘friendship’ as a concept. Used in essays and formal contexts.
  • (nakama) — ‘comrade, group member’. Stronger ‘in the same group’ feel than — teammates, fellow members of a cause.
  • (tomodachi no wa) — ‘circle of friends’.
  • 〜 (X to tsukiau) — can mean ‘go out with (romantically)’ OR ‘associate/hang out with’. Context tells which.