全自動彈藥補，長程砲彈，最大射程40km以上，每分鐘6發以上發射速度，99式155毫米自走榴彈砲（99HSP）

99式自走155mm榴彈砲（日語：99式自走155mmりゅう弾砲）是75式自走155mm榴彈砲後繼型，日本陸上自衛隊使用的自走榴彈砲。簡稱99HSP。
The Type 99 155 mm self-propelled howitzer (99式自走155mm榴弾砲, kyuu-kyuu-shiki-jisou-155mm-ryuudan-hou) is a self-propelled howitzer of the Japanese Ground Self-Defense Force, which was developed as successor of the Type 75 155 mm Self-propelled howitzer.