V grooves were a popular design feature in the 1990s, but the MP-32 irons were released in 2009 and feature a more traditional blade design. They have a more rounded sole and a wider topline compared to some other irons on the market, which helps to promote forgiveness and better performance.
If you're interested in learning more about the MP-32 irons, you can find detailed information on the Mizuno website or through golf equipment reviews.