Za-Zen is a meditation training for Buddism. Zen temple is famous for. But other school of temples have similar thing. Yagoata Kousyouji is esoteric Buddism Mikkyo temple( http://www.koushoji.or.jp/ ). Their Za-Zen is called Mikkyo-Zen or Ajikan. They have Za-Zen open seminar 3 times a month. Last Sunday afternoon I visited to there and attended the seminar. The monk instructed us. We had about 30 minutes meditation and the monk preached Buddism sermon a little. It was interesting experience for me.