Planning a vacation to Seiyo in Japan? This vacation planner will provide you with all the essential information you need. The nearest major city to Seiyo is Hiroshima. Take a short trip from Seiyo and set some time aside to explore the Hiroshima. Dotted with places like Hiroshima Peace Memorial Park, Hiroshima Castle, Shukkei-en; it will definitely be a good idea. Also, to reach Seiyo, you'll have to take a flight to Hiroshima; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. Most online packages to this city are of 1-2 days.