An awesome tour guide for Japanese in Hindi/Japanese

When I was solo travelling in Ladakh, I met one Japanese couple who had this awesome bilingual book as a tour guide. This book had Japanese words and their translation in Hindi along with pronunciation of the same written in Japanese. Both of them weren’t speaking fluent English, but whenever they needed to talk or convey something very basic they were referring this book along with one more English/Japanese book consisting of all maps, locations and details of places. I really was amazed by the book they had and sometime I think if more such books are published in more Indian languages it can increase scope of tourism.