Etymology and distribution of イワニツキ.

Iwanitsuki* 【イワニツキ】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Hiroshima-ken Onomichi-shi .

① Hiroshima-ken Onomichi-shi Originated from the striking of a small character in Toshimachi- ku, Tokashima.

② Hiroshima-ken Onomichi-shi Originated from Akira Miyahara's underwear in Setoda-machi.

※ In Yamaguchi-ken there was a case that Mr. Sugawara was also referred to as "a maneuver" in the Warring States Period. 三増 Mimasu reference.