Unlike most parks in Japan - I would give yourself a half or full day to explore the whole of this park. It may cost 400 Yen to enter - but it is well spent as the place is absolutely huge. As you can see - there is a large Ginko boulevard at the Tashikawa entrance. These looked fantastic but note they have now passed their prime and are now dropping many leaves. There will not be much left in a couple of days.