My experiences with Japanese food
A* : PJ Hilton
A : Tomoe SS15, Eastin Hotel
A - : Rakuzen Empire, Jyu Raku SS15,大将 SS15
B + : Rakuzen Courtyard, SS15, Hyotan SS15, Sakura SS12, Yamada SS15, Takumi, Tokyo Kitchen Taipan
B : Kinpachi SS17, Kiwami SS18, Kin Ryu Tei SS15
Category B are those that my last visit was more than a year ago, might be better now.

My worst experiences with Japanese food was in Mandarin Oriental Hotel, Jogoya Bukit Bintang and Shogan Sunway

I am running out of choices for Japanese food.