THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS TECHNICAL REPORT OF IEICE. † † † † 657–8531 1–1 E-mail: †{masa-n,igaki}@cs.kobe-u.ac.jp, ††shimojo@ws.cs.kobe-u.ac.jp API 5W1H API , , , API Considering Common Data Model to Mash-up Life Logs Masahide NAKAMURA† , Akira SHIMOJO† , and Hiroshi IGAKI† † Graduate School of Engineering, Kobe University 657–8531 Japan E-mail: †{masa-n