The third Neutron Summer School for young scientists in Japan, organized by the Neutron Scattering Association of Japan (NSAJ), was held both at KENS (Neutron Scattering Facilities, KEK, Tsukuba) and JRR-3M (JAERI, Tokai) from July 20–24, 1998. KENS has a pulsed neutron source of an accelerator base, while JRR-3M has a reactor-based steady neutron source. Participants used both pulsed and steady state neutrons. Consequently, the school was divided into two parts, in which the first half from July 20–22 was held at KENS. The content involved lectures on pulsed neutron scattering and educational experiments with FOX (diffractorneter for a single crystal), MRP (multipurpose diffractometer), VECA (powder diffractometer), PorePore (polarized neutron reflectometer), CAT (crystal analyzer type spectrometer) and INC (chopper type spectrometer) using pulsed neutrons.