I sent the request for joining the tour just the evening before and they accepted very quickly and i did everything online.
The kayak tour through the jungle is unique and the nature amazing. The guide provided full explanation in japanese, so i was not be able to really catch it.
They take amazing pictures for free during all the trip. 
I strongly recommend the tour and this company since they are smiling, gentle, professional and fair price.
They provided many trips according to your taste.
Good job, bravi 💪