Saitō Dōsan

Saitō Dōsan (1494-1556) was a warrior who embodied the spirit of gekokujo (the low overcoming the high) of the Sengoku period, feared by the nickname "The Viper of Mino." The legendary tale of his rise from oil merchant to daimyo of an entire province has been passed down as one of the most dramatic success stories of the Sengoku era.

Recent scholarship suggests Dōsan's rise was actually a two-generation process begun by his father, but the fact of his ascent from a commoner background to daimyo status remains, cementing his position as a symbol of the merit-based Sengoku age. What distinguished Dōsan as a warrior was his extraordinary combination of political cunning and military talent, employing every stratagem of Sengoku realpolitik—intrigue, assassination, and ambush—to seize Mino Province.

Regarding swords, Mino was a renowned sword-producing region; the blades collectively called "Mino-mono" (Mino swords) were highly valued for their robust construction suited to actual combat. Dōsan actively patronized Mino swordsmiths, encouraging the production of high-quality practical swords. The Seki smiths whose techniques were established during Dōsan's era became the foundation of present-day Seki City, Gifu Prefecture's cutlery industry.

Dōsan negotiated a marriage alliance with Oda Nobunaga, giving his daughter Nōhime (Kichō) to Nobunaga. The famous story of their meeting—in which Dōsan, upon seeing the young Nobunaga, reportedly sighed that "I cannot match my own child"—demonstrates Dōsan's keen eye for character. Tragically, in 1556, Dōsan was killed in battle by his own son Yoshitatsu at the Battle of Nagaragawa, dying after sending Nobunaga a letter bequeathing him the province of Mino.