Nijinomatsubara (虹の松原 nijinomatsubara) is a 360-year-old pine forest in Karatsu, Saga. It has a width of 400 - 700 metres, a length of about 4 km, and a total area of 240 hectares. It was also referred as The Black Pine Forest of 1 Million Trees (100万本のクロマツを中心とした松林 hyaku man hon no kuromatsu wo chuushin toshita matsubayashi), however this name is uncommon today.
The forest was originally planted by the feudal lord Terazawa Hirotaka as a counter-measure against the strong winds and tides in Karatsu Bay. Today it is a popular tourist spot, and on a list of the 100 most beautiful places in Japan.
- Yokatoko (in Japanese)