Right, so tokyo's craft beer game is brilliant but you won't find it in convenience stores. Here's where to go for proper pints:

Baird beer taproom in harajuku. American-owned brewery with proper ipas and seasonal ales. ¥800-1200 per pint which sounds steep but it's quality stuff.

Ty harbor brewery near shinagawa has waterfront seating and brews on-site. Their wheat beer is spot-on and the fish and chips aren't terrible either.

Avoid the 'beer gardens' on department store rooftops - they're just asahi in plastic cups with overpriced food. Stick to dedicated craft spots for the real deal.