Background
Yai Senzo was born on 1863 in Nagaoka, Niigata Prefecture, Japan.
ヤイ 千蔵
Yai Senzo was born on 1863 in Nagaoka, Niigata Prefecture, Japan.
Moved to Tokyo (1884) where, while repairing a German-built battery, Yai Senzo learnt its rudiments and later began building his own using carbon sticks saturated in paraffin. He marketed them under the trade-name Yai Dry Battery and they soon became very popular.