Visited during the peak of the GW holidays and there still weren’t a lot of crowds! The place is a bit small but definitely worth a visit if you’re in the area and looking for something different. Entrance is free though they do close pretty early (5pm). It’s part of a Western building pilgrimage around Yokohama and they have stamps for each building which may be interesting to some (certainly was for me) so I’d recommend bringing your stamp book if you have it!
This is my favourite of the Western-style heritage buildings on the hill, probably due to my affection for stained glass and the Arts & Crafts style. The price is right (free), and on my most recent visit I was treated to spectacular music from a duo on violin and piano, which I'd assumed erroneously was recorded music at first, they were that good. The house itself is an attractive and interesting example of architecture of the era, and its setting is terrific, with a lovely garden and great view.