Observatory report from Japan

Recent three major activities of radio astronomy in National Astronomical Observatory of Japan (NAOJ) are presented. One is the construction of Atacama Large Millimeter/submillimeter Array (ALMA); NAOJ is constructing Atacama Compact Array (ACA) for ALMA, and ALMA band-4, -8, and -10 receiver cartridges for all of ALMA antennas. The others are activities for running Nobeyama Radio Observatory (NRO) and Mizusawa VLBI observatory. Toward science with ALMA, NRO is operating the 45 m telescope, and ASTE (Atacama Submillimeter Telescope Experiment) 10 m telescope in Chile in collaboration with Japanese universities and the University of Chile. Mizusawa is operating VERA (VLBI Exploration of Radio Astronomy) dedicated to phase referencing VLBI for Galactic astronomy, consisting of four 20 m telescopes across Japan and performing astrometry observations of H₂O or SiO maser sources. Other activities led by Japanese universities are also reported.