Tekkan

is the current daimyō of the Land of Lightning.

Shikamaru Shinden: A Cloud Dancing in Forlorn Falling Petals
Tekkan attends the Five Great Countries Summit, convened in response to the looming invasion of the Land of Flowers by the Land of Earth. Because the Land of Lightning has an alliance with Flowers, Tekkan is opposed to the invasion and believes the justification offered by the Earth's daimyō, Danjō, is insufficient. Danjō retorts that the Land of Flowers is not worth debating over nor protecting from invasion, and alludes to the Raikage, Darui, feeling the same way. Tekkan admits that Darui is "insolent", but otherwise does not respond to Danjō's claim.

As an alternative to the invasion, the Land of Fire's daimyō, Ikkyū Madoka, offers to surrender some of his country's territory to the Land of Earth; the Earth would gain the fertile lands it desires, and war would be averted. Tekkan is intrigued by the idea, especially when Ikkyū proposes allowing all countries - not just the Five Great Shinobi Countries - to offer their opinions at a Continental Summit. Tekkan and the other daimyō agree to this letting the Land of Flowers' fate being decided there.

Great Sea Battle of Kirigakure Arc
In the anime, Tekkan is invited to the unveiling cermony of Kirigakure's new power generator, Shinonome. Following the ceremony, Tekkan is frustrated that Awaji is riding the Number 1 aircraft with other world leaders while he rides the second.

Trivia

 * Despite being named in the novel, Tekkan is credited as Lightning Daimyō in the anime credits.