So a fan brought one of those grip strength testers to tonight's DDT show and had everyone they could test theirs, documenting each result in a tweet with photos. I'm a big fan of random information like this so here's everyone's results! Each person will include a link back to the original tweet (unless they were grouped in with someone else, in which case you'll see theirs in the last link).
Read the results and extra tid-bits from O.P below!
Kimihiro = 50.7 kg / 111.7 lbs
MAO = 66.0 kg / 145.5 lbs
GM Imabayashi = 39.3 kg / 86.6 lbs
Ref Matsui = 34.9 kg / 76.9 lbs
Ref Kiso = 42.4 kg / 93.4 lbs (Kiso was pleased to hear he beat Matsui)
Koroku = 43.3 kg / 95.4 lbs
Matsunaga = 55.6 kg / 122.5 lbs
Junta = 60.4 kg / 133.1 lbs
Masada = 57.7 kg / 127.2 lbs
Naomi = 57.8 kg / 127.4 lbs (Apparently he's lost 20 kg in grip strength since he cut weight, which is about 44 lbs)
Ishida = 41.1 kg / 90.6 lbs (Ishida, tipsy and in high spirits, was too loud and got told off by Naomi lol)
Akito = 50.1 kg / 110.4 lbs
Sanshiro = 43.6 kg / 96.1 lbs
Dieno = 46.7 kg / 102.9 lbs (Dieno used to be at 50 kg when he played soccer)
Hirata = The machine kept having an error whenever he tried to do it, which I guess means Hirata's grip is so strong you can't measure it in measly human numbers!
Shunma = 43.4 kg / 95.6 lbs
Yuni = 34.0 kg / 74.9 lbs
To-y = 62.7 kg / 138.2 lbs (The third strongest!)
Ueno = 56.6 kg / 124.7 lbs
Chris = 63.9 kg / 140.8 lbs (The second strongest!)
Sumi = 38.2 kg / 84.2 lbs (initially there was much confusion because the machine was set to lbs accidentally, making it look like Sumi had a grip strength stronger than anyone there)
Rukiya = 50.5 kg / 111.3 lbs
Harashima = 54.2 kg / 119.4 lbs
Naya = 51.3 kg / 113.0 lbs
Kanon = 81.9 kg / 180.5 lbs (the strongest of them all!)