Kurosawa directed 7 of the top 25 Japanese films, per TSPDT, while another acclaimed director, Yasujiro Ozu, directed 5. I *almost* excluded Ozu, as well, but felt I didn't have to. As a result, Ozu dominates *this* list, with a total of 6 films. Kenji Mizoguchi didn't do too badly, either, with 5 films. (an early draft of this list excluded the works of all 3)
List image: "Tokyo Story"
Directors w/films listed by item number:
Kazuo Hara--22
Takeshi Kitano--19
Masaki Kobayashi--18
Hiorkazu Koreeda--15
Kiyoshi Kurosawa (no relation)--21
Hayao Miyazaki--5, 6, 16
Kenji Mizoguchi--3, 4, 7, 9, 24
Mikio Naruse--10
Nagisa Oshima--11
Katsushiro Otomo--20
Yasujiro Ozu--1, 2, 8, 12, 17, 23
Kaneto Shindo--25
Isao Takahata--14
Hiroshi Teshigahara--13