The TSE has blamed Fujitsu - which is responsible for the development and support of its trading platform - for its worst ever systems crash earlier this month.

The shutdown was caused by the failure of Fujitsu to issue some instructions linked to a software upgrade carried out last month to its subsidiary, Tosho Computer Systems (TCS). The exchange says "part of a necessary step was missing in the instruction" which caused a malfunction during a regular monthly clean-up of the dealing system.

Fujitsu president Hiroaki Kurokawa will take a salary cut of 50% for six months from December. Salaries of six other executives will be cut by 10-25% for three to six months.

The move follows a similar set of penalites imposed by TSE which cut the pay of its president and nine other senior executives for six months following the systems breakdown.