The company behind a new nuclear power plant in the United Kingdom says that "no formal decision" has been made on its future following an arrest of the report,
The Nikkei Asian Review reported that Hitachi's council would probably decided to suspend all work at Wylfa Newydd on Anglesey next week
In December, the company said it would do its utmost to ensure the £ 20 billion nuclear power plant works.
A Welsh government statement described the relationship as "troubling".
"This is a great project with significant economic benefits for Wales and the rest of the country," reads the statement.
"We will continue to monitor the situation very carefully and put pressure on the British government to do everything can help bring this project to Anglesey."
Actions in Japanese society have increased by 8% since the relationship .
Speculations have increased because Hitachi will cancel the Horizon nuclear power plant project due to potential construction cost increases.
The Welsh Assemblyman of Anglesey, Rhun ap Iorwerth, said the company appears to be "closer to a decision on Wylfa that does not progress".
"The signs do not look good," he told BBC Wales Good Wales Wales [1
On Friday, the company said the suspension of the project remained an option.
"At the moment no formal decision has been made in this regard, while Hitachi has evaluated the Horizon project including its potential suspension and the related financial impacts in terms of economic rationality as a private company", reads a statement.
The United Kingdom Government had formally negotiated with Hitachi the project since June.
The new nuclear power plant should have a generating capacity of 2900 MW by the middle of 2020 and have a 60-year operating life.
The Wylfa nuclear power plant near Cemaes was closed in 2015 after more than 40 years of service.