This glass negative is made by Wilhelm Weimar around 1900. It documents a possible method of arranging Japanese sword accessories for display. Whereas Brinckmann sought to categorize the tsuba (finely ornamented iron sword guards) according to formal criteria (with a Darwinian tendency that propounded an evolution from simple to complex forms), Hara pleaded for a division into schools, in that he favoured tracing lines of tradition.

Only a few of the over 2000 tsuba are on display in the permanent exhibition. The large part of the collection is kept in drawer cabinets in the attic.