Kitamaebune Maritime Trading Heritage of Esashi, Esashi Oiwake Folk Song & Matsumae Castle

Long before Sapporo was laid out in the Meiji era, the southern tip of the Oshima Peninsula around Esashi and Matsumae served as the historic cradle of classical Japanese culture in Hokkaido from the 17th century onward. This region’s extraordinary wealth was powered by the **Kitamaebune**—single-masted wooden merchant ships that sailed the Sea of Japan trade route between Osaka and Hokkaido. Exporting prized Hokkaido marine products such as dried herring (*nishin*) and *kombu* kelp while importing Kyoto silks, fine porcelain, and aristocratic culture, Esashi grew so prosperous during the herring season that a famous Edo proverb declared, *"Even Edo in May is nowhere near as bustling as Esashi."* Out of the lives of these Kitamaebune sailors and herring fishermen emerged **Esashi Oiwake**, universally regarded as the pinnacle and most technically demanding traditional folk song (*min’yo*) in Japan. Sung in free rhythm accompanied by the haunting notes of the *shakuhachi* bamboo flute, performers must master extraordinary breath control and vocal ornamentation that rise and fall like the rolling swells of the Sea of Japan. At the southernmost tip of the peninsula stands **Matsumae Castle (Matsumae-jo)**, the northernmost traditional Japanese castle in the nation and the sole feudal domain (*han*) fortress ever built in Hokkaido during the Edo period. Surrounding the castle is a historic temple district celebrated for over 10,000 cherry trees spanning 250 distinct varieties—many of them rare, late-blooming *yaezakura* cultivars bred at Matsumae’s ancient temples over centuries.