And then stop?

笑止千万
shou.shi.sen.ban

Literally: smile – stop – thousand – ten thousand

Alternately: Extremely absurd, ridiculous, stupid; pitiful, unfortunate.

Notes: 笑止 refers to something funny – or stupid – or pitiable – or worrisome – or embarrassing, while 千万 is an intensifier that can be attached to a wide variety of other words (and appears in a number of yojijukugo) in order to create extreme versions.

More political commentary, aimed at the DPJ (民主党).