"In 1672 a French fleet arrived in Ceylon. King Rajasimha II, who learned that the French were against the Dutch, permitted them to build a fortress near the harbor of Trincomalee, with the hope of getting their help to defeat the Dutch."
So, if Rahula is correct, then there was significant contact between the French & the Sri Lankans (Ceylon is a former name for Sri Lanka). This contact did not happen in Medieval Japan, but, a French FLEET & a FORTRESS in 1672 Sri Lanka, that is very significant, a part of Sri Lankan history that I did not know, have not heard about until now.
Weird how modern fiction may have unknowingly reflected an old fact.
But how true is what Rahula heard re: this French fleet. If anyone out there is an expert in French history & can point to a French record from 1672 re: a fleet arriving in Sri Lanka & building a fortress there w/ the help of the Sri Lankan king, let me know. Thanks.
UPDATE: that Wikipedia link re: King Rajasimha II mentions the French, as in their interaction with Sri Lanka may have happened.
UPDATE 2: that Wikipedia link does not seem to work, just search under Rajasimha II at Wikipedia for the article I saw