• 互いたがい

  each other, one another

• 互助ごじょ

  mutual aid, cooperation, benefit

• 互換ごかん

  interchange

• 互角ごかく

  equal (in ability), even, evenly matched, well-matched, on par (with)

• 互選ごせん

  election by mutual vote, election from within a committee (party, etc.), internal vote

• 交互こうご

  alternate, alternating

• 相互そうご

  mutual, reciprocal

• 互いにたがいに

  mutually, with each other, reciprocally, together

• 互い違いたがいちがい

  alternate, alternation

• お互いにおたがいに

  mutually, with each other, reciprocally, together, both

• 相互銀行そうごぎんこう

  mutual savings bank

• 相互交流そうごこうりゅう

  mutual exchange

• 互市ごし

  trade, commerce

• 互酬ごしゅう

  reciprocity

• 互用ごよう

  using together, using in turn

• 互先たがいせん

  even game (esp. in go)

• 互恵ごけい

  reciprocity, mutual benefit

• 互にかたみに

  mutually, reciprocally, together

• 互生ごせい

  alternate (esp. of leaf arrangement)

• 互譲ごじょう

  give and take, mutual concession, conciliation, compromise

• 互助的ごじょてき

  friendly

• 互換性ごかんせい

  compatibility

• 互酬性ごしゅうせい

  reciprocity

• 互助会ごじょかい

  benefit society

• 互譲的ごじょうてき

  conciliatory

• 互換機ごかんき

  compatible machine, clone (e.g. IBM PC), workalike

• 交互にこうごに

  alternately, by turns, one after the other

• お互いおたがい

  each other, one another

• 互変異性ごへんいせい

  tautomerism

• 互恵貿易ごけいぼうえき

  reciprocal trade

• 互恵関税ごけいかんぜい

  reciprocal tariff

• 互換製品ごかんせいひん

  interchangeable product

• 互恵条約ごけいじょうやく

  reciprocal treaty, treaty of reciprocity

• 互いに素たがいにそ

  coprime, relatively prime

• 互角勝負ごかくしょうぶ

  equal contest, close game, well-matched game, even match

• 互角稽古ごかくけいこ

  training by participants of the same skill level (kendo)

• 互恵関係ごけいかんけい

  reciprocal relationship, mutually beneficial relations, relationship with benefits to both parties

• 相互配属そうごはいぞく

  cross attachment

• 相互不信そうごふしん

  mutual distrust

• 相互訪問そうごほうもん

  mutual visitation, reciprocal visits

• 相互通信そうごつうしん

  intercommunication (usu. in telecoms contexts)

• 相互支援そうごしえん

  mutual support

• ピン互換ピンごかん

  pin-compatible

• 相互理解そうごりかい

  mutual understanding

• 交互作用こうごさよう

  (mutual) interaction, reciprocal action, interplay

• 相互協力そうごきょうりょく

  bilateral cooperation

• 相互参照そうごさんしょう

  cross-reference

• 上位互換じょういごかん

  downward compatible, backward compatible, compatible with input or components intended for lower tier or older systems, versions, etc.

• 相互関係そうごかんけい

  mutual relationship, interrelationship, interaction

• 相互保険そうごほけん

  mutual insurance