OCN is a three letter abbreviation that stands for: 1  OCLC Control Number, a bibliographic record identifier. 2  In Oncology nursing, an Oncology Certified Nurse. 3  Opaskwayak Cree Nation. 4  Open College Network.
Autumn is from September to November and is characterised by light breezes and cooler temperatures of around 46-50ÂºF. Itâs during autumn that many exhibitions, music concerts and sports tournaments are held in Japan.
Seasons and Weather. The best time to visit Japan is generally in spring or autumn. Spring (March â May) sees a lot of the country ablaze with beautiful white and pink cherry blossom, celebrated with an increasingly popular festival. Temperatures during these months begin to rise and it is before the hot rainy season.