Published by Hyoden-sha. Recommended for those who have opportunities to speak in front of people. Cassette tape, 2 volumes. For those who prefer reading, "Yomu Kusuri" (Reading Medicine) by Ohmae is recommended. From the ears, eyes, and mouth: Referencing street performer's patter, timing is key. Your strongest ally. The so-called "tekiyasan" (street vendor) language as performed by Kiyoshi Atsumi. Also recommended for those interested in words.