Fans of Wagamama's famous katsu curry will be excited to find out that the restaurant chain are launching a limited edition sauce this week. 

In conjunction with National Katsu Curry Day, the Japanese favourite will be altering their untouched curry sauce recipe to bring hungry customers a much more firey version of the popular classic. 

Created in 1992, the sauce is often paired with crispy chicken and sticky rice, and is mild enough that they do a children's version. 

However, the masters behind the delicious dish have upped the spice for one week only. 

Starting this Thursday (September, 20) and running until the following Thursday - which is National Katsu Curry Day - customers will be able to try the sauce and decide if they prefer the added heat.