一心同体

Yojijukugo (四字熟語), from 一心 (isshin, “one heart”) +‎ 同体 (dōtai, “same body”)

• (Tokyo) いっし​んどーたい [ìsshíꜜǹ dòòtàì] (Nakadaka – [3])
• IPA^(key): [iɕːĩn do̞ːta̠i]

• (Tokyo) いっし​ん [ìsshíꜜǹ] (Nakadaka – [3])
• IPA^(key): [iɕːĩɴ]

• (Tokyo) どーたい [dòótáí] (Heiban – [0])
• IPA^(key): [do̞ːta̠i]

一(いっ)心(しん)同(どう)体(たい) • (isshin dōtai) 

1. (of people) the state of being fully on the same wavelength
   • 2005 November 9, Nobuhiro Watsuki, “武(ブ)装(ソウ)錬(レン)金(キン)ファイナル”, in 武(ブ)装(ソウ)錬(レン)金(キン), volume 9, Tokyo: Shueisha, →ISBN:

     来(く)るぞ　カズキ！手(て)を放(はな)すな！キミと私(わたし)は一(いっ)心(しん)同(どう)体(たい)　キミが死(し)ぬ時(とき)が私(わたし)が死(し)ぬ時(とき)だ！

     Kuru zo Kazuki! Te o hanasu na! Kimi to watashi wa isshin dōtai Kimi ga shinu toki ga watashi ga shinu toki da!

     Incoming, Kazuki! Don’t let go! You and me, together as one. When you die, I die!