=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Sakai               647/041 RLR(1966) is 8.0m below Attached BM
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 26-Mar-2002
Sakai gauge replaced May 1978.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 20-Nov-2003
Datum 1997 is 1.200m  below Tokyo Peil.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 23-Feb-2011
Dataset buddy checked with Saigo - Saigo profile is generally lower but features compare well.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 21-Feb-2012
A massive earthquake magnitude 9.0 occurred at 14.46 JST (05.46 UTC) on Friday 11th March 2011 with the epicentre 70km east of the Oshika Peninsula of Tohoku.It was the most powerful known earthquake to hit Japan triggering a tsunami with waves up to 40.5m and travelling up to 10km inland.