Saitama and Gunma
Or: a tale of two prefectures.
Over our time here, Ingrid became obsessed with visiting as many different prefectures as possible. On our last free weekend before leaving Tokyo she came up with a mad plan to visit three new prefectures in one day out on the railway.
We first got the train to Omiya, in Saitama prefecture. This is actually the nearest prefecture to where we live, but had never actually visited it before. However Omiya is also the home of the railway museum. So we went there in the morning. There were many old trains.