When Junya Watanabe, chef-owner of Rakiraki Ramen and Tsukemen (4646 Convoy St.), talks with you, he looks through you. There’s an air of the rock star about Watanabe. Part of it is his hair, another the way he carries himself and another his highly fashionable, slightly edgy attire. Watanabe has an intensity that would be perfect for a politician or CEO. It’s an intensity that infuses every bowl of ramen at Rakiraki.