Here are some collections of filmed Japanese short stories.
ゆまに書房「ＤＶＤ版 名作ってこんなに面白い」サンプル 羅生門
There are several ways to find individual authors' works made into a movie.
1. Go to Advanced Search in InfoHawk and use Author Words search with Format limit to DVD.
2. Go to Advanced Search in InfoHawk. Search Japanese author's name with Subject keywords, Film adaptations.
2. Go to Advanced Search in InfoHawk. Use Foreign films -- Japan and Film adaptations as your Subject keywords.