1. Research associate, Criminal Investigation Laboratory, Metropolitan Police Department; 2-1-1 Kasumigaseki, Chiyoda-ku, Tokyo 100-8929, JP.
2. Research associate, Oji Paper Co. Ltd., Advanced Technology Research Laboratory; 4-3-1 Jokoji, Amagasaki-shi, Hyogo 660-8577 JP.
3. Graduate student, Graduate School of Agriculture and Life Science, Laboratory of Pulp & Paper Science, The University of Tokyo; 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JP.
4. Assistant professor, Graduate School of Agriculture and Life Science, Laboratory of Pulp & Paper Science, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JP.