Hasseki
Hoshiai Hasseki (1669-1693; by other sources: 1666-1692) 7dan Pupil of Dosaku. In 1683 he made his first apperance in castle games. In 1691 he retourned to Ise (due his illness) and there died in 1692.
Castle Games:
Hayashi Monnyu - Hoshiai Hasseki B+4 1683-01-17
Hoshiai Hasseki - Hayashi Monnyu W+3 1684-01-05
Yasui Chitetsu - Hoshiai Hasseki B+8 1685-01-20
Hayashi Monnyu - Hoshiai Hasseki B+R 1685-12-25
Inoue Dosa Inseki - Hoshiai Hasseki B+3 1688-01-14
Inoue Dosa Inseki - Hoshiai Hasseki B+5 1690-01-29
He won six of the seven castle games he played. Wikipedia Japanese edition lists a loss in 1688 (by 3 points, playing white) against Inoue Dosa Inseki.
Some games of this prodigy:
http://web2go.board19.com/gopro/psnx_list.php?id=517