A warrior, statesman, swordsman, and calligrapher of the Bakumatsu and early Meiji periods. Serving as a shogunal retainer, he excelled in martial arts. In 1868, before the formal Meiji negotiations, he boldly entered Saigō Takamori's camp alone as an emissary of Katsu Kaishū and conducted the preliminary talks that opened the path to the bloodless surrender of Edo. In the Meiji government he served as Imperial Chamberlain and Vice-Minister of the Imperial Household. In swordsmanship, he founded the Mutō-ryū (No-Sword School) as an independent branch of the Hokushin Ittō-ryū, embodying the ideal of "sword and Zen as one." He was also ranked among the three great calligraphers of the Bakumatsu period, known for his bold, powerful brushwork. Together with Katsu Kaishū and Takahashi Deishū, he is called one of the "Three Swords of Bakumatsu." In his final years he built Zenkoku-ji Temple and devoted himself to discipleship and Buddhism. In 1888, ill but seated upright, he wrote his final character, "Spirit" (rei), and died in meditative posture.