Japanese

Isaniwa‐jinja‐Shrine Sangaku

Cultural assets of Ehime Prefecture
(closed now)
All right reserved

Ema tablets(22)
Wasan
is a traditional Japanese mathematic developed in the Edo period.
Sangaku is an Ema (tablet) with mathematical problems of wasan on it donated to a shrine or a temple by wasan mathematicians. Mathematicians prayed for the solution first. Once they solved the question, in gratitude for the success, they donated an Ema with the question on it. The person who then solved the question donated an Ema with the answer and a new question on it. Thus Sangaku meant an academic presentation for mathematicians and a good education for ordinary people in those days. There are 22 Ema tablets donated to this shrine. It is rare that there are so many Sangakus left in one place in Japan. Some of them are so damaged that the pictures of them are open to the public to preserve them

Sangaku1(107×76p)

Sangaku2(75×105p)

Sangaku3(77×107p)

Sangaku4(76×107p)

Sangaku5(99×127p)

Sahei Oonishi(1803) Matabei Kojima(1812)

Cyoujirou Sano(1832)

Kazue Kanno(1832) Eitarou Wada(1837)

Sangaku6(84×75p) Sangaku7(86×111p) Sangaku8(86×104p) Sangaku9(84×75p) Sangaku10(84×75p)
Syuuhei Senba(1847) Kiuemon Yamasaki(1850) Tomigorou Yamasaki(1850) Ichitarou Hitokawa(1850)

Jyouzaemon Ideue(1850)

Sangaku11(81×76p) Sangaku12(83×74p) Sangaku13(84×74p) Sangaku14(82×73p) Sangaku15(80×71p)
Satarou Kuribayashi(1850) Yasuzou Kawahara(1850) Kinjirou Hanayama(1850) Mineji Ochi(1850) Mohei Yoshida(1854)

Sangaku16(112×73p)

Sangaku17(50×80p)

Sangaku18(91×75p)

Sangaku19(87×61p)

Sangaku20(56×86p)

Makie Toshino (1861) Tamejirou Isaki
Ryouzou Ishizaki
(1861)
Kinjirou Kousaka(1873) Tomigorou Kirino(1878) Tasaburo Matsuoka(1879)

Sangaku21(98×62p) Sangaku22(39×55p)

Cyuugorou Nomoto(1884)

Masanori Nakamura(1937)