I received a call from this number and said "hello" twice without a response, so I hung up. Just as I was hanging up, someone started talking. I called the number back on my landline, and a recorded message answered, saying "Thanks for calling. The survey you are calling about has ended."
Likely a scam since the recording didn't say who they are or what the "survey" was about.
ROTTEN SCUMBAGS: Ring with no answer. Now I can expect innumberable repeat calls now that they know I picked up the line. I've blocked it, but expect more of these cockroaches.
Got a ring from this number, reported to my operator as I'm out of the country and don't want an extra charge. Hopefully, 611 won't have a charge from Japan.