オホーツク海かい気き団だんMeanings1nounOkhotsk air massA cool, moist air mass that forms over the Sea of Okhotsk, often influencing summer weather in northern Japan.オホーツク海かい気き団だんの影えい響きょうで、北ほっ海かい道どうの夏なつは涼すずしいことが多おおい。Due to the influence of the Okhotsk air mass, summers in Hokkaido are often cool.