Shirase Glacier (Japanese: 白瀬氷河; Shirase Hyōga) is a large glacier entering Havsbotn, the bay that forms the head of Lutzow-Holm Bay in Antarctica. The area occupied by this feature was first mapped as a bay and named Instefjorden (the innermost fjord) by the Lars Christensen Expedition, 1936-37. Surveys by JARE, 1957-62, revealed the large glacier in this position which they named after Lt.