From the mid-April to mid-May timeframe, Awaji Hanasajiki Garden in Hyogo is filled with thousands of Icelandic poppies in various colors. Also known as Siberian poppies, this variant is extremely cold-resistant and they hold up well even when temperatures dip overnight.
From certain parts of the garden you can also enjoy some impressive views out over the Akashi Strait and Osaka Bay while you're appreciating the beautiful blooms.
Admission to Awaji Hansajiki is free of charge.