My reply to be posted in a moment on his page I have several sources including Dictionary of Hindu Lore and Legend ISBN  by Anna Dhallapiccola and Hindu Goddesses Vision of the Divine Feminine in the Hindu Religious Traditions ISBN  by David Kinsley telling about Apasaras and they have never equated them with any other legendary or mythical entity The book on the Japanese Art may have mentioned both being the same  that would not make them the same as the concept of Apsaras are older than the Buddhism and they find references in the Rig Veda Hindu scriptures and Hindu mythology tell about scores of Apasaras and they live in the court of Indra Some of the Apasaras include Urvasi Menaka and Rambha As regards references there are several which do not connect them with any other type of fairies or angels I would request you to please note that wikipedia has still to become the ultimate sources of sum total of human knowledge and hence contents continue to be finetuned Similarly I saw yesterday a merge tag to merge Durga with Durga Puja  I removed the same as any such merger is like merging Chirst with Christianity or vice versa I think that you understand the issues involved I feel your book on art may have equated Tennin with Apasara to give more weight to the concept of Tennin or to clarify the point to the uninitiated  though I can not comment on that book as I have not read the same There are several books which claim so many things and all such claims should be weighed on the totality of the available sources I am not sure if Tennin is an exact  Japanese word for Apasara  only  unbder this situation both shall be the same Regards