Information:  - Contemporary hit radio (also known as CHR, contemporary hits, hit list, current hits, hit music, top 40, or pop radio) is a radio format that is common in the United States, United Kingdom, Ireland, Canada, New Zealand, Australia, Singapore and South Africa that focuses on playing current and recurrent popular music as determined by the top 40 music charts. There are several subcategories, dominantly focusing on rock, pop, or urban music. Used alone, "CHR" most often refers to the CHR-pop format. The term "contemporary hit radio" was coined in the early 1980s by "Radio & Records" magazine to designate top 40 stations which continued to play hits from all musical genres as pop music splintered into adult contemporary, urban contemporary and other formats.  - Ikeda Nagamasa ( ; 1519  June 10, 1563) was a kokujin and samurai commander during the Sengoku period. Ikeda Katsumasa and Ikeda Tomomasa were his sons.  - A radio station is a set of equipment necessary to carry on communication via radio waves. Generally, it is a receiver or transmitter, an antenna, and some smaller additional equipment necessary to operate them. Radio stations play a vital role in communication technology as they are heavily relied on to transfer data and information across the world.  - His father was Ikeda Nagamasa and his younger brother was Ikeda Tomomasa.  - The is a period in Japanese history marked by social upheaval, political intrigue and near-constant military conflict. Japanese historians named it after the otherwise unrelated Warring States period in China. It came to an end when all political power was unified under the Tokugawa shogunate.  - Ikeda Tomomasa (   ; 1544 -- 1603 ) was a kokujin and military commander in the Azuchi - Momoyama period . He was the second son of Ikeda Nagamasa , who was a dominant kokujin in Settsu Province . His older brother was Ikeda Katsumasa . In 1568 , when Oda Nobunaga marched his armies , Tomomasa and Katsumasa under Miyoshi clan battled against him . However , they were not equal to him by their nature . They surrendered and served Nobunaga . In 1570 , when Ikeda clan 's infighting happened , Katsumasa who was the family head was purged . Because of that , Tomomasa succeeded to a house . In 1571 , he held secret communication with Miyoshi Nagayasu , Miyoshi Masayasu and Iwanari Tomomichi , and betrayed Nobunaga . They defeated Wada Koremasa and killed him . However , Tomomasa surrendered again after Nobunaga ruled Settsu Province completely . He became a retainer of Araki Murashige . In 1580 , he served Hashiba Hideyoshi after Murashige betrayed Nobunaga and was defeated . Tomomasa under Hideyoshi took part in the Battle of Komaki and Nagakute and the expedition to Kysh ( in 1586 ) . He served Tokugawa Ieyasu and was given 5,000 koku after Hideyoshi died . After Tomomasa died , his son , Ikeda Shigenobu succeeded to a house . However , his domain was seized by the shogunate .  - KOKU (100.3 FM)  branded as Hit Radio 100  is a commercial contemporary hit radio (CHR) radio station licensed to Hagåtña, Guam. It is owned and operated by Moy Communications Inc.     After reading the paragraphs above, we are interested in knowing the entity with which 'ikeda tomomasa' exhibits the relationship of 'occupation'. Find the answer from the choices below.  Choices: - canada  - father  - military  - radio  - samurai
Answer:
samurai