It was raining when we arrived. We spent most of the afternoon exploring the shops, underground walkways, and getting lost. Thankfully the weather the next day was a lot clearer (sky tends to clear up around 9:30ish), and we hired the free bikes from the hotel. Yeah free bikes are great.
Himeji is a grid city like Adelaide and dead easy to get around. We cycled up to the castle, and around the town before catching the afternoon train to Hiroshima.