The Warrior Who Put 'Love' on His Helmet — Why Did Naoe Kanetsugu Wear the Ai Kabuto?
Naoe Kanetsugu's helmet bore the character 'ai' (love) — but not the romantic love of today. What did it mean, and why did a Sengoku warrior choose this character?
A deep read
The ‘ai’ character on Naoe Kanetsugu’s helmet most likely represents devotion to the Buddhist deity Aizen Myo-o or the Shinto deity Atago Gongen — not romantic love. The original helmet survives in Uesugi Shrine, Yonezawa. Kanetsugu was the chief administrator of the Uesugi domain, known for both bold confrontation with Ieyasu and devoted governance of his people.
Portrait of Naoe Kanetsugu — the great Uesugi administrator known for his 'ai' helmet, embodying loyalty, love, and compassion
Wikimedia Commons / CC BY-SA 3.0
Uesugi Kenshin — adoptive father of Kanetsugu's lord Kagekatsu. In the Uesugi clan known for Kenshin's 'Bi' (Bishamonten) banner, Kanetsugu chose 'ai'
Wikimedia Commons / Public Domain
Battle of Sekigahara — the decisive battle partly triggered by Kanetsugu's provocative letter to Ieyasu. The Uesugi sided with the Western Army and lost