Study of hypernuclei with electron beams

Professor Osamu Hashimoto of Tohoku University passed away on February 3, 2012. As well as leading the nuclear physics laboratory of Tohoku University, Prof. Hashimoto contributed much to hypernuclear and strangeness nuclear physics community for years. In this decade, he devoted himself to establish the (e,e′K+) hypernuclear spectroscopy. I will review progresses of Λ hypernuclear spectroscopy with a memory of this decade which I was privileged to share with Prof. Hashimoto.