This is the Bell 212(JA9560,"Hirose") operated by Japan Coast Guard(JCG). It took the dive persons and trained the salvage at Sendai air station(Sendai airport).
This is the Beech 200T(JA8854,"Black-tailed gull") operated by Japan Coast Guard(JCG). It left Sendai air station(Sendai airport) to do the exhibition flight, and flew low over by about 450 kilos(about 280 miles) per hour and the high degree about 20 meters(about 70 feet).
They are two seals and are serving as the image characters of Japan Coast Guard(JCG). The brother's name is "Mr. Umimaru" and the sister's name is "Miss Umin".