I have just ordered the NHK Taiga drama series Nobunaga: King of Zipangu. I have waited for a long time to get my hands on this. From what I have heard from the SA Online Citadel, it is one of the best. It stars Ogata Naoto, Nakamura Toru, and Frank Neil. I will let you know when I receive the set.
I am still reading up on Paul Varley's article as well as Tanegashima by Olof Liden. The more I read up on Nobunaga and guns related to the purchase in 1549, it appears that Hashimoto Ippa made the deal to click. Sure, Nobuhide might have given his son the go ahead or the cash. However, someone had to help Nobunaga make the deal done and that was Hashimoto Ippa.
Tenka no tame!