Could I realistically subsidize my trip with UberEats

So I'm planning to go to Japan for 4 months(May to August) next summer and I've seen a lot of post with mixed feelings about doing Uber in Japan

YES I WOULD BE ON A WHV(working holiday visa)

I would go with at the very least 10 000$ minimum in Canadian(1,115,890.00¥ yen).

I want to keep my savings for housing/emergencies over there

So if I did ubereats for 4-5 maybe 6h a day or until 5,590¥ a day with a under 800$(89,421.20¥) rent. Does anyone that has done Ubereats think it's realistic if I still want to be able to enjoy my time.