In 1689 Matsuo Bashō walked 2,400 km through Tohoku and Hokuriku over 150 days with his disciple Sora, composing haiku at famous historical sites. The journey produced ‘Oku no Hosomichi,’ combining travel prose with haiku in a form that has been read for 1,300 years. Key poems: ‘Summer grasses — all that remains of warriors’ dreams’ at Hiraizumi, and ‘Such stillness — the cries of cicadas seep into the rocks’ at Risshakuji.