The refreshing cold udon "pork maribukkake" of pork shabu-shabu and vegetable marinade is from Marugame Seimen--I tried it a little earlier!
"Pork Mari Bukkake" is a new menu in early summer that combines cold salted bukkake udon with marinade of cabbage and onion and "pork shabu". You can eat it refreshingly even in the damp season.