[1] Japan Adv. Inst. Sci. and Technol., Ishikawa, 923-1292, Japan
[2] Iwate Prefectural University
[3] Tokyo Institute of Technology
[4] Department of Mathematics, Tokyo Metropolitan University
[5] SSL of Fujitsu Ltd.
[6] Inst. New-Generation Comp. Technol.
[7] School of Information Science, Japan Adv. Inst. Sci. and Technol.
[8] Dept. of Software and Info. Science, Iwate Prefectural University
[9] Info. Processing Society of Japan
[10] Department of Physical Electronics, Tokyo Institute of Technology
[11] Fujitsu Ltd.
[12] Inst. New-Generation Comp. Technol., Fujitsu Laboratories, Ltd.
[13] Japan Adv. Inst. Sci. and Technol.
[14] Info. Sci. and Eng. Res. Division, Grad. Sch. Tokyo Inst. of Technol.
[15] Japan. Soc. for Artif. Intelligence