Six Assorted Japanese Coins

Interesting link, thanks for that.

Nice coins in the lot! The Bunkyu 4 mon is among my favorite cash coins... just a nice break from the (...) (...) tong bao formula.

Also a bit of light reading on Japanese history:

https://en.m.wikipedia.org/wiki/Battle_of_Koan

Through that lens, the common motif of waves on Japanese coins makes a lot more sense. Not once but twice the Mongolian army set its sights on Japan and assembled a massive invasion force. Both times, the Sea of Japan was hit by a massive typhoon which crippled the invasion fleet, leading them to slaughter when the made landfall. The Japanese saw this as a sign that they had won the favor of the heavens, and dubbed the eveny Kamikaze, or divine wind. Wave patterns or designs can be found on:

4 mon coins from the 1700s-1860s, when the imperial powers of the West set their eyes on this resource-rich island and encouraged missionaries to try to undermine traditional values to open the doors to "trade" (colonization)

Taisho 5 and 10 sen coins, 1920-25

Various 1 and 10 sen coins during WWII

Thanks all... not my area of expertise at all... the first link was great... can't open the wiki battle of K link.

Fascinating history there... the Mongols were tough people but the Japanese are such a stubborn enemy, with such a fighting spirit I think they would be the last opponent I would willingly engage in battle. With the elements also against them I am not surprised the Mongol casualties were so harsh.