CHRONOLOGY

October 3rd, 1778	Born in Kunitomo Village in Sakata-Gun (Present day Kunitomo town in Nagahama City)
1794	Takes over the family business at 17 years of age. Is given the name Toube. Becomes the 9th in line.
1811	Makes direct contract with the government in Hikone. Fulfills order of 200 cannons causing the Hikone Incident ( Conflict with the elders in the Kunitomo Blacksmith Guild). 34 years of age.
1813	Marries. The Kunitomo Blacksmith Guild notifies the central government about the Hikone Incident. 36 years of age.
May 1816	Is called to Edo (present day Tokyo) because of the Hikone Incident. 39 years of age.
October 5th November 1st 1818	In Edo he encounters an airgun of Dutch origin at the house of Daien Yamada. Proceeds to start production of an airgun of original design. Writes and presents Daisho onteppo haritateseisaku to Sadanobu Matsudaira. 41 years of age
March 9th 1819	Completes production of first airgun. Presents it to Takamasa Kyogoku. 42 years of age.
1820	At the house of Masanaga Naruse he sees a reflecting telescope of Dutch origin. 43 years of age.
1821	Returns home to Kunitomo from Edo. 44 years of age.
1824	Builds Shinkyo, a holographic mirror, and dedicates it to the Kunitomo Hiyoshi Shrine. 47 years of age.
1826	Completes original design of crossbow. 49 years of age.
1828	Designs a portable brush for writing and gyokuto (oil lamps) 51 years of age.
June 20th, 1832	Starts work on reflecting telescope. 55 years of age.
October 11th, 1833	Finishes production of reflecting telescope. Begins maping astronomical bodies. 56 years of age.
February 18th, 1834	Illustrates the face of the moon.
February 19th, 1834	Illustrates the face of the moon.
March 9th, 1834	Illustrates the face of the moon.
March 13th, 1834	Illustrates the face of the moon.
January 6th, 1835 to February 8th 1836	Observes sunspots over the span of a year and two months. (Viewed 212 times on 158 days.)
April 26th, 1836	Illustrates Venus, Jupiter and Saturn. 59 years of age.
August 9th, 1836	Illustrates the face of the moon.
August 15th, 1836	Illustrates the sun at 4 PM.
December 3rd, 1840	Ikkansai passes away at his home at 63 years old.

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Technological Prowess and Life

An introduction to Ikkansai’s upbringing and works throughout his life.
Timeline

A chronology of Ikkansai’s life.
Historical Document Research

A two year project funded by Nagahama city to research distinctive culture for regional revitalization.
Ikkansai Kunitomo Document Index

Documents currently under examination and organization. The latest findings are posted.
Important Documents

An introduction to the many inventions that Ikkansai envisioned.
Request reference material

The materials that are publicized in the Ikkansai Kunitomo Document Index may be used for research purposes.