=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Ofunato II          642/022 RLR(1976) is 8.6m below Attached BM
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 26-Mar-2002
Ofunato II replaced I (642/021) 25th May 1973;
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Feb-2010
From the RLR plot a rising trend in the dataset is clearly visible.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 22-Feb-2011
Profile compares well with that for Ayukawa.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 22-Feb-2012
A massive earthquake magnitude 9.0 occurred at 14.46 JST (05.46 UTC) on Friday 11th March 2011 woth the epicentre situated approx. 70km east of the Oshika Peninsula of Tohoku. The earthquake was the largest to strike Japan and triggered a tsunami with waves of up to 40.5m travelling up to 10km inland. 
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 13-Mar-2014
The GPS benchmark information has been downloaded from the SONEL website. GPS benchmark P205 is 13.696m above RLR.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 05-Apr-2022
Following review of data affected by the Tōhoku earthquake of 2011, all data has been flagged as good as GSI have recommenced levelling at the site. The station flag has been set to indicate the record needs to be treated with care, but the data appears to accurately reflect the earthquake's ongoing effect on local relative sea level.