Back كيوتسوجو هيراياما ARZ Kiyotsugu Hirayama BS Kiyotsugu Hirayama Catalan Kiyotsugu Hirayama English Kiyotsugu Hirayama Spanish Kiyotsugu Hirayama French קיוצוגו היראיאמה HE Kijocugu Hirajama Croatian Hirajama Kijocugu Hungarian Kiyotsugu Hirayama Italian
Hirayama Kiyotsugu (jap. 平山 清次; * 13. Oktober 1874 in Sendai; † 8. April 1943 in Tokio) war ein japanischer Astronom.