Officer's Personal Flag on a Naval Dirk

[Dave0258]

I recently came across this one, and am asking for some feedback here on the forum.  It is obviously based on a Navy Model 1883 dirk.  The scabbard is actually metal, most likely to allow for the flag to be furled and stored inside.  The rest of the fittings seem genuine to me.  I know that the reference books have examples of Imperial flags on a sword body, much like what is shown here on the dirk.  What little I have found suggests this is a personal flag used by a Naval officer too designate his authority? I have asked some people for help in translating what is written on the flag but so far, no one has felt confident to confirm what is written.  I can find nothing in Fuller & Gregory or in Banks.  Any comments from the Forum?  Any thoughts on a translation of the writing on the flag?  Thanks.

[Dave0258]

I did receive a scanned page from a Japanese textbook (Nihon Gunto Zuroku by Shindo Susumu?)  I'm not familiar with that book.

 

[Tensho]

Here's a similar one on a parade sword variant. Sword knot is Police. 

Edited Friday at 11:45 PM by Tensho