Japanese signed photo has writing on back of photo also .I  have no idea what it says unknown year or location photo taken

Japanese signed photo

Japanese soldiers shooting blindfolded Sikh prisoners.
 This happened in Singapore, shortly after the British surrendered. Those poor Indian soldiers, blindfolded, were used as target practice, with white cards placed on their chests, where the heart was located.

If bullets failed, they were bayoneted.

Execution

Japanese artillerymen firing a Type 38, 150-mm howitzer during the battle for the Chinese city of Xiamen.