Harugichiban Naming Day

What Is Harugichiban Naming Day?

Every February 15th is "Harugichiban Naming Day" (春一番名付けの日, Harugichiban Nazuke no Hi) in Japan. On February 15, 1963, the term "harugichiban" (春一番, "first wind of spring") was used for the first time in a newspaper headline — appearing in the Asahi Shimbun to describe the strong, warm southerly wind that typically marks the first notable warming of early spring in Japan. The meteorological term had existed in regional usage, particularly in fishing communities of the Japan Sea coast where the first spring storm was an important navigational event, but its appearance in a national newspaper headline on this date established it as standard Japanese vocabulary.

What Is Harugichiban?

"Harugichiban" (春一番, "spring number one") refers to the first strong southerly wind of spring — specifically, a warm wind exceeding 8 meters per second that occurs between the spring equinox date period and a preceding date, bringing a significant temperature rise that signals the seasonal transition from winter to spring. The phenomenon occurs as winter pressure systems give way to the weather patterns of spring, drawing warm, moist air northward from the Pacific or southern seas. In Japan's Sea of Japan coastal communities, the harugichiban had long been recognized as a dangerous event that could produce sudden storms.

The Origin of the Term

The term "harugichiban" is believed to have originated in the fishing communities of the Goto Islands and the Japan Sea coast of Kyushu and the San'in region — areas where the first strong southerly spring wind was associated with fatal fishing boat accidents. According to one account, the term arose from a storm in the 1850s that killed many fishermen, after which the community called the first strong spring wind "spring number one" in grim commemoration. The Japan Meteorological Agency now officially announces the harugichiban for each weather district annually, and the announcement receives significant media coverage as a harbinger of spring.

Seasonal Language in Japan

Japan has a rich vocabulary of seasonal phenomena — terms for specific types of winds, rains, and weather patterns that mark the transitions between seasons. Harugichiban, tsuyu (梅雨, rainy season), kogarashi (木枯らし, cold winter wind), and many others reflect Japan's intimate attention to seasonal change that is expressed in poetry, art, cuisine, and daily cultural practice.

Fun Facts

• JMA announcement: The Japan Meteorological Agency's annual harugichiban announcement — typically in February or early March — is broadcast on major news programs and signals to Japanese audiences that spring is approaching, whatever the current temperature might suggest.
• Regional variation: Not all of Japan experiences harugichiban — the Hokkaido region and Okinawa are excluded from the official announcement criteria, as the phenomenon is most characteristic of the Pacific coast of Honshu, Shikoku, and Kyushu.