Hikaru Otsuka, Akihiro Kawasaki, Hiroshi Tokutake. In-flight Rotor Blade Tip Damage Detection of Small Multirotor using Ultrasonic Sensors. Transactions of the Japan Society for Aeronautical and Space Sciences(under printing). 2024. 67. 4
Justin Winslow, Hikaru Otsuka, Bharath Govindarajan, Inderjit Chopra. Basic Understanding of Airfoil Characteristics at Low Reynolds Numbers (104-105). Journal of Aircraft. 2018. 55. 3. 1050-1061
Hikaru Otsuka, Daisuke Sasaki, Keiji Nagatani. Reduction of the head-up pitching moment of small quad-rotor unmanned aerial vehicles in uniform flow. International Journal of Micro Air Vehicles. 2018. 10. 1. 85-105