A negative‐ion‐based NBI test‐stand has been constructed in Toki site of National Institute for Fusion Science (NIFS). This Toki test‐stand has facilities to produce 2.5 MW neutral beam power with the energy of 125 keV for hydrogen and 250 keV for deuterium, which is utilized for developing a unit of neutral beam injection (NBI) system for Large Helical Device (LHD). All components of the Toki test‐stand are installed on the basis of conceptual design of the LHD‐NBI system. Development of a high‐current negative ion source with vacuum‐immersed structure is one of the main objectives of the test‐stand, as well as transport of a high‐energy beam with a small divergence angle. It is also an important subject to test all of hardware components such as beam dumps and cryo‐pumps. Experiments started in July.