Here are English maps of the main villages on Yakushima:
NAGATA and ISSO
Map of Nagata
MIYANOURA
Map of Miyanoura (English)
ANBO
Anbo Map (English)
ONOAIDA
Map of Onoaida (English)
KOSEDA
Map of Koseda (English)
HIRAUCHI and YUDOMARI
Map of Hirauchi (English)
KURIO and NAKAMA
Map of Kurio (English)