Indian food in Japan taste exactly the same? Either the author is some ignorant sap who has never really eaten indian food or the indian food restaurant around him are just THAT good (or vice versa as in Indian food he ate in India being shit)
That or he has tastebud failure in relation to this stuff. (Most Chinese steamed/fried fish in my country tasted the same to me even though the fish could be a different species or even if it was just 'not fresh'.)