According to Chinese and Sri Lankan sources when Kashyapa Buddha died his entire skeleton was enshrined in a stupa made by King Naraki. According to Huen Tsang this stupa was north east of Mahsi stupa. Narkotwa is definitely the stupaof Kashyapa Buddha. It is east of Kotia village which according to Huen Tsang is a stupa that marks the spot Kashyapa Buddhas house was. People living here belong to the Kashyapa gotra so it tallies with what Huen Tsang writes. The first three letters 'Nar' of Narkotwa is similar to the first three letters 'Nar' of Naraki which is the kings name. Kotwa means a tope. So Narkotwa will definitely mean the tope Naraki made. All the other places Huen Tsang mentions are found in the vicinity.

Heres the link to the youtube video of the village on top of the stupa

https://www.youtube.com/watch?v=bPm068sfBT4