By Bérangère Chatelain / ETX Studio As Japan fully reopens its borders to tourists this October 11, many travelers will be back in the land of the rising sun in time to witness a tradition that has been rooted in Japanese life for centuries: observing the autumn colors that trees display in this season. It is nearly as important as the contemplation of cherry blossoms (a tradition known as hanami) in springtime, and it also has a name: momijigari meaning ‘red leaves hunting,’ from the word momiji for the famous red tone of the maple leaves. As Japan fully reopens its borders to tourists this O…