Four-Character Idiom · Combat & Force · Kyojuro Rengoku
Meaning
Strength enough to uproot a mountain and a spirit vast enough to cover the world — heroic capacity in both body and will.
山を抜き取るほどの力と、世を覆い尽くすほどの気力。圧倒的な頼もしさ。
The Kyojuro Rengoku line
Verbatim from the source article
「俺は俺の責務を全うする！！ ここにいる者は誰も死なせない！！」
"I WILL FULFILL MY DUTY! I WON'T LET ANYONE HERE DIE!"
Why it fits Kyojuro Rengoku
Rengoku's opening declaration to the train passengers is batsuzan-gaisei in modern Japanese: a single voice claiming the strength to lift everyone in the carriage out from under the demon's threat by himself. The promise is kept.
Cultural note
Origin in classical / Buddhist / Confucian tradition
Originally Xiang Yu's self-description in the Records of the Grand Historian — the warlord who could lift mountains and whose spirit covered the age.
Sources
- デジタル大辞泉 — 抜山蓋世 (dictionary)
- 精選版 日本国語大辞典 — 抜山蓋世 (dictionary)