I thought Hirokazu Koreeda was going to be making a samurai jidai-geki. Wait, he did, in 2006. Hana yori mo naho. Here's a review: "The only samurai movie with pink flowers on the cover."
Odd then, that even considering how much they talk about his films being somehow representative of Japan, the period movie doesn't come up at all in his interview with Shimon Tanaka, published at The Rumpus.