Best water and gas company for Tokyo

Hello! So this is my first time handling these such things since my place before had free water provided and was all electricity. Now that I've moved to a new place I need to find a gas and water company. I have octopus as my electricity conpany already since I used them before and they were pretty alright, so I was wondering which gas and electricity companies do everyone use? Especially for the ones living in Tokyo and can I apply online rather than calling them directly? Help and suggestions would be appreciated!

by Juiseii