Tamamaki-Tachi: With twin fish decorations attached to the sword
From Shimane Prefecture
Yasugi-shi Ueda-cho (in Shimane Prefecture)
From Shimane Prefecture’s Kamienyatsukiyama Kofun
Ento-tachi
**
Kondo sono-tachi
**
Hoto-tachi
From Watanukikannonyama Kofun
Kinginso kabutsuchino-tachi
**
Kinginryumon-tachi
Detail of sword hilt gilt etching below
Below are circular pommel-swords with dragon motif:
JAPANESE MYTHOLOGY & FOLKLORE 
Were there no Tsurugi/Ken swords available from these kofun period mounds?
Any info on this rare blade would be most helpful.