Officially there are no jet powered Shinden drawing. Name of Shinden-kai is not official,too.
Kyushu Hikoki did not start jet powered Shinden design until the end of the war.
Engineer of Kyushu hikoki(Kunitake Kiyohara, section submanager of No.1 design section of Kyushu Hikoki) said so.
But it's true that the IJN ordered Kyushu Hikoki to design Shinden considering future turbo jet engine installation.
Engine was Ne-130, thrust 900kg, estimated jet powered Shinden's maximum speed with Ne-130 engine was 420kt(780km/h).
The IJN planned that jet powered Shinden use JATO when take off.
Shinden had laminar flow wing.(Maximum thickness located 45% wing chord.)
Sourec : Aireview magazine, extra number, Unknown military aircraft development(Vol.1/2) page 51, March 1999, ISBN4-87357-049-2 C9453