It also forecast weaker cargo freight volumes due to the slowing global economic conditions, and the demand-supply balance has deteriorated due to the delivery of large-sized containerships.
In the first-half ended 30 September 2011, NYK swallowed a net loss of JPY12.06bn ($150.35m) as against a net profit of JPY44.37bn in the same period last year.
Revenue stood at JPY911.18bn compared to JPY1.01trn a year ago.
Against the backdrop of poor first-half results, NYK revised down its earnings forecast for the financial year ending 31 March 2012 to net loss of JPY18bn. The previous forecast was for a net profit of JPY5bn.