Confucianist, calligrapher and painter at the latter part of the Edo period.
Kaioku was born in Awa Province (present Tokushima Prefecture) as a son of Yoshii Naoyoshi, Samurai retainer of Awa Domain.
Kaioku went to Osaka and studied Confucianism under Nakai Chikuzan.
He also studied chirography under Nishi Nobuyuki, and the Kano style painting
under Yano Sukehiro.
Later, he went to Kyoto and established a private school.
Kaioku made researches of calligraphy styles in the Heian period (794-1192)
and established quaint and elegant style.
He is counted as one of the "Big Three of Calligraphers at the end
of Edo Period" along with Ichikawa Beian and Maki Ryoko.
Kaioku deceased in 1863 at the age of 86.
Value = about US$ 60 thousand