The problem is ANA only allows for roundtrip booking and any seats are snatched right away by folks redeeming via AC/UA that allows for one way booking. These days there are lots of people with large point balances, and there are many tools out there that alerts you when seats open up, hence seats are hard to find even a year ahead. To get around the one way restriction, you could try this hack: hack https://onemileatatime.com/book-one-way-ana-award/