I went to Nirasaki and Hokuto city for o-hanami (cherry blossom viewing).
Wanitsuka-no-sakura was a bit late for its full bloom, but still beautiful. When it's clear, you can see Mt. Yatsugatake over the tree.
Jindai-zakura in Jisso-ji temple is said to be almost 2,000 years old! It's one of the three big cherry trees in Japan, and is considered as a national natural treasure. A group consisting of tree doctors has been maintaining its root and surround. http://www.unshouen.co.jp/cn9/pg42.html