When I played didgeridoo at Singing Sticks in 2012, I met Paul and tried his didgeridoos. His didgeridoos were very light but sound heavy, and one of them made 5 keys horn sound amazingly. Back pressure was very good and I thought they were also good for fast-blowing players. You might be worried to buy without trying it in Japan, but I think they have enough quality for paying money.
If you order the length of mouth attached parts and pitch, Paul might advice and choice your best one. If my impression helps Japanese didgeridoo players who seek good quality one, it’s my pleasure. Thank you.