All In The Family?

Some ebay purchases for show and tell, but they got me thinking.

First, a couple of recent kanna I picked up on ebay (as usual, for a decent price)

On the left in the first pic is a 65 mm Dogyu and on the right a 65 mm Sukeichi. Second pic is of a Dogyu that Alex Gilmore (thejapanblade.com) has on ebay currently which has the identical markings so you can see what they all mean. Alex also has info on the blacksmith Imoto Masao on his website:
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Source: http://www.woodworkforums.com/f111/all-family-131198/

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