WASHINGTON, Aug. 24. - Mail advices from Japan, including official and private letters and files of newspapers, have been received at the Japanese Legation in this city. The Tai Won-Kun, father of the King of Corea, has been declared Regent of that country.
    When the last demands of Mr. Oton, the Japanese Minister to Corea, (Who is reported to have been assassinated a few days ago,) had been refused by the Corean Government, he started for the palace to have a personal interview with his Majesty. His troops acted as escort to the Tai Won-Kun, at the latter's request. When the party was about to enter the palace, it was fired on by men wearing the uniforms of Corean soldiers. The Japanese repulsed the attack and Mr. Oton and the King's father proceeded to the royal chamber, where the King appointed the Tai Won-Kun Regent.
    It is claimed that the attacking part consisted of Chinese soldiers in disguise. The Japanese press is exceedingly pleased with the appointment of the Tai Won-Kun.
    Liberal subscriptions have been received by the Japanese Government for the troops in Corea. Many entertainments with this object in view are being held, and these and other efforts closely resemble the affairs given to provide clothing and material comforts for both the Union and Confederate troops during the late war. Actors have tendered the proceeds of performances and wealthy people have subscribed many thousand yen. It is interesting to note that 200,000 catties of biscuit ordered by the War Department were made of second-grade American flour, which is considered superior to the Japanese flour.
    A scheme to sell the common property in Yokohama, and to contribute the money to war expenses is not likely to be realized. There is a strong suspicion that the schemers are taking advantage of the popular frenzy about the war to purchase the property on easy terms.
    Patriotism in Japan is apparently almost universal. News of victories over the Chinese sets the population with with enthusiasm. The supply of volunteers for war service exceeds demand. Japanese professional wrestlers of whom there are many, have offered their services to be formed into an organization of "strong men," and a Japanese newspaper estimates that Nishinoumi, the champion, would be a match for nine and two-thirds Chinamen. Fencing masters and their pupils have also applied for enlistment for the avowed purpose of cutting off Chinese pigtails with heads attached.
    A number of fires have broken out in Chinese quarters of Japanese towns, and these usually result in fights between mobs of each nationality.
    The police have managed to protect the Chinese in these affrays, acting under instructions to prevent Japanese from insulting, assaulting, or molesting Chinese residents within the borders of the empire.
    Many Chinese have attempted to disguise themselves. The owners of a Chinese lottery have, it is reported, let their hair grow, cut off their cues, and adopted the Japanese costume.