Three codes could be found hidden in the December 10th – Japan post on the Investigate Ingress blog.
[1] a8bdacc6ccbbbaabbabcabb6b0b1ccccccaab0
[2] ryraksia63638ouqiqaza
[3] ;yr39?279hn
Code #1
Observations
Look like hex but out of Ascii range
Code #2
Observations
So far no solution has been found
Code #3
Observations
Passcode format is there but those punctuation characters need to mean something