Masauji Hachisuka

, 18th Marquess Hachisuka, was a Japanese nobleman, ornithologist and aviculturist.

Biography Hachisuka was born in Tokyo on February 15, 1903 to Lady Hachisuka Fudeko and Marquess Hachisuka Masaaki, a marquis and Vice-Chairman of the House of Peers. He was the great grandson of the 11th shōgun Tokugawa Ienari, and the nephew of the last shōgun Prince Tokugawa.

He attended the Gakushūin (学習院), or Peers' School, in Tokyo before moving to England at age 19 to complete his education. In England he was supported by Baron Hayashi Gonsuke, the Japanese Ambassador in London and a friend of his father’s, and was admitted in 1924 to study zoology at Magdalene College, Cambridge. While at Cambridge, his interest in birds grew considerably with encouragement from naturalist Dr. Francis Guillemard and British ornithologist A. H. Evans, leading him to join the British Ornithologists' Union and attend British Ornithologists' Club dinners.

As an undergraduate, Hachisuka went on expeditions to Iceland in 1925 (with his A Handbook of the Birds of Iceland being published a few years later in 1927 ) and to North Africa with German ornithologist Dr. Ernst Hartert in 1927. Although obituaries by his friends reference his having graduated in 1927, there are no records of him ever having taken the preliminary examinations or of his graduation. In 1927, he returned to Japan through the United States with French ornithologist Jean Théodore Delacour, with whom he would later go on to visit China and Korea.

In February 1928, Hachisuka founded the Japanese Biogeographical Society with Japanese zoologist Watase Shozaburo. He conducted an expedition to the Philippine Islands from 1928 to 1929 to study the distribution of the local avifauna, after which he brought collections made during the expedition with him back to London, working with them at the Natural History Museum in London and the Natural History Museum at Tring. and a four-volume work, The Birds of the Philippine Islands published across at least four volumes from 1931 to 1935. He also wrote about the birds of Egypt, Iceland, Hainan and Formosa. Around 1930, Hachisuka became a Corresponding Fellow of the American Ornithologists' Union, travelled to the Belgian Congo with Belgian zoologist Dr. Jean-Marie Derscheid, and reportedly visited with the Bulgarian royal family.

Hachisuka wrote an account of the birds of the Mascarene Islands, particularly the dodo, and was in the early stages of writing a book about the birds of China when he died after suffering from a heart ailment on May 14, 1953. His work on Mascarene Island avifauna, The Dodo and Kindred Birds, was published posthumously in 1953.''

Ancestry Hachisuka's uncle Tokugawa Yoshinobu was the last shogun of Tokugawa.