Also if you look on the NDL task bar, top right, those crazy kids have added a cool "before and after" button which allows instant access to the database, you can spy out publications of a similar theme-------look for ←前の巻号 & 後の巻号→
Check out some of the variations on the polearms including the Naginata variants including one with tines like a Sai (Page 23 image 3 on the right) and what looks like a "Kumade" - "Bears Claw Rake" on a pole (Page 24 images 2 & 3)
See Roald Knutsen's "Japanese Polearms".
Interesting also to see on the same page Happuri worn with Ko - Eboshi(Is that the correct term).
Page 26 Image 3 wha'ts that? (Seen something like it in Shirasaya at Aoi Art in Tokyo)
That, Malcolm old fruit, is an early form of naginata that have a socket welded to the back of the blade near the base. Believe it or not I once saw one for sale at an arms fair in the UK and ignored it because the shaft had been cut off short. Now of course I would have snatched the seller's hand off, but then ... I was probably broke. Ian B