2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54541On the occasion of the 60th birthday of Professor Keiji Kikkawa, Kikkawa-type physics performed at Ochanomizu was personally reviewed, and the generation of the metric is discussed with the condensation of the string fields.Latex file, 5pp. Contributed to the proceedings in honor of the 60th birthday of Professor Keiji KikkawaHigh Energy Physics - Theorytext