These were almost certainly written by "our" guy:
白井邦彦. 1956. 屋久島の野生鳥獣相及び屋久犬. 鳥獣集報 (Japan Wildlife Bulletin), 15: 53-79.
白井邦彦. 1958. 八丈島の鳥獣相. 鳥獣集報 (Japan Wildlife Bulletin), 16: 161-173.
白井邦彦. 1960. 八丈島の鳥獣相(第2報). 鳥獣集報 (Japan Wildlife Bulletin), 17: 197-200.
(These are notes about the fauna of Japanese islands -- Yakushima for the first one; Hachijō-jima for the two others, this being part of the Izu archipelago -- by someone named Kunihiko Shirai, published in the same outlet as the OD. I don't find this journal online either, unfortunately. The refs are taken from a publication in 鳥 / Tōri.)
Searching for 白井 and 鳥獣集報 actually yields more:
白井邦彦. 1956. 屋久島の野生鳥獣相及び屋久犬. 鳥獣集報 (Japan Wildlife Bulletin), 15: 53-79.
白井邦彦. 1958 : 八丈島の鳥獣相. 鳥獣集報 (Japan Wildlife Bulletin), 16: 161-173.
白井邦彦. 1959 : 三宅島の鳥獣類(第一報). 鳥獣集報 (Japan Wildlife Bulletin), 17: 91-106.
白井邦彦. 1960 : 北伊豆諸島の鳥類相. 鳥獣集報 (Japan Wildlife Bulletin), 17: 179-191.
白井邦彦. 1960 : 三宅島の鳥獣類(第2報). 鳥獣集報 (Japan Wildlife Bulletin), 17: 193-196.
白井邦彦. 1960 : 八丈島の鳥獣相(第2報). 鳥獣集報 (Japan Wildlife Bulletin), 17: 197-200.
白井邦彦. 1961 : 青ケ島の鳥類相. 鳥獣集報 (Japan Wildlife Bulletin), 17: 197-200.
白井邦彦. 1961 : 御蔵島の鳥類相. 鳥獣集報 (Japan Wildlife Bulletin), 18: 109-118.
白井邦彦. 1961 : 八丈小島(伊豆七島)の鳥類相. 鳥獣集報 (Japan Wildlife Bulletin), 18: 119-124.
白井邦彦. 1961 : 青ケ島の島類相. 鳥獣集報 (Japan Wildlife Bulletin), 18: 125-132.
To me, it looks like there's been quite a few guys by the surname Shirai, active in Japanese ornithology, in about the same Era.
Thus, finding the OD (to see/verify/confirm whatever is told in it) seems more and more crucial.
I agree that it would be better to see the OD.
Yet, as said OD:
三島冬嗣 [Mishima, Toji]. 1960. [A new race of Apus pacificus breeding in the southern parts of Izu Islands, Japan.] 鳥獣集報 (Japan Wildlife Bulletin), 17: 201-202.
appears to follow directly Kunihiko Shirai's paper:
白井邦彦 [Shirai, Kunihiko]. 1960. 八丈島の鳥獣相(第2報). [Birds and animals of Hachijō-jima (2nd report).] 鳥獣集報 (Japan Wildlife Bulletin), 17: 197-200.
...and given that Hachijō-jima is part of "the southern parts of Izu Islands, Japan", I'd actually be quite amazed if someone else than 白井邦彦 [Shirai, Kunihiko] ended up being the dedicatee.
Could very well match a guy born in "1922", as found/told/suggested by Laurent (in post #73).
Yes, indeed -- and being "still a lecturer at the hunter training course" would also match the subject of the publications of the 1922-born guy in question.