I’m sorry for my late reply to Sugiura-san’s question.
Thank you for advice.
First, I think frequency of price change need 4 times in annual.
Because, scheme of RMI difference each OEM and timing of CR price fixed is usually irregular.
We are proceeding to revise the price of 2Q’s one now.
The reason of delay which I inform to concern is need to clear current price history.
After change price on May, it will change again on July.
After that, it will continue Oct, Jan, Apr…
However, this timing is applied to SRI selling price.
Actually, the timing SRT purchase it will after 3 month cause need readtime.
(For example, issue PR, PO, transportation and something.)
It will be image as below.
> SRI apply price approval on first month of Quarter.
> SRT effect new price to PR from 2nd month of Quarter.
> SRT purchase tire at new price from first month of next Quarter.