im super happy you currently in Sho's phase since that dork need more love + your eternal love to Ohno well im a Yama shipper so any love for my 2 fave is welcome lol

well you into Sho + Okada but im the opposite im totally into Ohno + Okada (the submarine ship deserve more love + he currently practice Jeet Kun Do with Okadacchi all the feel the slowly get back their friendship after Okada guest in Mannequin5 and Shiyagare sharing their history before V6&Arashi happen)

well i think Okada have guest many time in Sho's show even before it change name to abunai Yakai but i don't remember which ep im sure others can point to you
in Gakkou e Ikou! 2002-01-05 there very young Okada and Sho doing mission together
the shiyagare and VS Arashi with Okada all worth watching

in V6 anniversary con last year there a little Sho&Okada moment during the mc and then Inocchi mention them hug and then Sho shout his famous line to Bussan

well not sure if you still need the ep number since everyone already reply to you but the yama art battle
G no Arashi 2006.03.01 ep.21
G no Arashi 2006.08.23 ep.46
i watch this art battle for millionth time just to laugh at Shofail + the awesome Yama

not sure bout you but i really like his recent Japonism solo Rolling Days