Proposed 3-M Alt-Az Telescope As The Japanese Next Large Telescope

We are considering to have a series of telescopes in this century. As a goal, it is thought that a new technology telescope with a effective diameter over 10-m will be built at the best site with high altitude. As the first step, design works for the 3-m alt-az telescope are started by some helps of various observatories in U.S.A and Europe. This telescope will have a 3-m primary mirror with honeycomb structure and short focal length (F/2). We expect that these efforts together with others are essential to building of very large telescopes and will make them with substantial cost reduction.