Details
- First Name: Masukichi
- Family Name: Sawanoi
- Native name: 實川延一郎
- Also Known as: じつかわ えんいちろう, 実川延一郎, 澤ノ井増吉, さわのい ますきち, 市川福瓶, いちかわ ふくべ, Ichikawa Fukube, 市川廣藏, いちかわ ひろぞう, Ichikawa Hirozo
- Nationality: Japanese
- Gender: Male
- Born: July 21, 1875
- Died: April 10, 1940
