Read this at onrec.com

” The Chartered Institute for Personnel and Development reports that staff churn at UK companies is 15.7% and that the estimated direct cost of replacing an employee is 50% of their starting salary (once advertising, training, administration and management time is taken into account). With an average salary of £22,000, a business of 250 staff could lose £430,000 a year simply due to dissatisfaction with the office environment. In the financial or legal sectors, where recently qualified employees can average salaries nearer £50,000, the cost is closer to £1 million.”

That is nearly JPY 90,000,000 to 208,000,000, the cost of renovating an office for 250 staff.