^ Good day Jul3!
I somehow know of this show's existence long ago, but it never occurs to me that it might not be well known in this forum!
I should try to post more episodes on here. I quite like the format actually, each episode only feature two members, for plenty of screen time for each member, & it not a very long show too so it not overly time-consuming either. My guess is that since it is an Fukuoka-area-based show (methink, since the new HKT show with sasshi hosting is their only national show I heard), it is not well known.
About the thingie they were digging'n'eating, it lotus root! &... it doesn't have an English wiki page!
Well basically it taste a little bit like potato, & it is quite an health item too. It can be used as herb, or used just for general eating (at least this is the case in Taiwan.) In case you are interested, here's
the Mandarin wiki, & here's
the Japanese one.
& Here's three pics of what it look like:
Hope that helps!