©2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Modeling of Rakugo Speech and Its Limitations: Toward Speech Synthesis That Entertains Audiences SHUHEI KATO1,2, (Student Member, IEEE), YUSUKE YASUDA1,2, (Student Member, IEEE), XIN WANG2, (Member, IEEE), ERICA COOPER2, (Member, IEEE), SHINJI TAKAKI3, (Member, IEEE) AND JUNICHI YAMAGISHI2,4, (Senior Member, IEEE) 1The Graduate University for Advanced Sciences (SOKENDAI), Hayama, Kanagawa, Japan 2National Institute of Informatics, Chiyoda, Tokyo, Japan 3Nagoya Institute of Technology, Nagoya, Aichi, Japan 4The University of Edinburgh, Edinburgh, UK Corresponding author: Shuhei Kato (e-mail:
[email protected]). This work was partially supported by a JST CREST Grant (JPMJCR18A6, VoicePersonae project), Japan, and by MEXT KAKENHI Grants (16H06302, 17H04687, 18H04120, 18H04112, 18KT0051), Japan. The authors would like to thank Prof. Masaru Kitsuregawa of the National Institute of Informatics for kindly providing useful suggestions on rakugo speech synthesis. ABSTRACT We have been investigating rakugo speech synthesis as a challenging example of speech synthesis that entertains audiences. Rakugo is a traditional Japanese form of verbal entertainment similar to a combination