The first Japanese gardens I saw on my visit to Japan was in Hiraizumi. It takes a while to fully appreciate the artistry of a Japanese garden, so initially I felt somewhat underwhelmed. The gardens are small in scope and at first note seem random.
It was only after I had seen more of the gardens all across Japan (Kanazawa, Kyoto) that I was able to grasp that most of what I was seeing was not random nature, but planned and arranged to look natural. Back home I looked at the pictures and those from Hiraizumi stood out.
The site is spread across the city. There is one trail where there is a bear warning. The temples are fine examples and I felt that Hiraizumi was a good start on my Japan trip.
Getting There
Hiraizumi is a bit off the average travellers itinerary for Japan. But equipped with a Japan Railpass and relying on the excellent Japanese high speed rail network it's easily feasible as a relaxed day trip from Tokyo (Ueno). In Hiraizumi itself you can do everything on foot.
On Japanese Gardens
While Hiraizumi is a great garden, the best garden I have seen was in Kanazawa (Kenrokuen). I really hope the Japanese will submit it eventually. Apparently, Japanse list the following three as the best landscape gardens: