Question: Kotaro Honda was taught by a pioneer of Japanese physics during what period?

Context articles: KS Steel
Sword of the Stranger
Kotaro Azuse
CVCC
Kotaro Fujikawa
Hantaro Nagaoka
Issac Koga
Kotaro Yamazaki
Honda Today
Kotaro Honda

KS Steel, a permanent magnetic steel with three times the magnetic resistance of tungsten steel, was developed in 1917 by the Japanese scientist and inventor Kotaro Honda.
 KS stands for Kichizaemon Sumitomo, the head of the family-run conglomerate, who provided financial support for the research leading to KS Steel's invention.
 Honda would go on to invent NKS steel in 1933 whose magnetic resistance is several times higher than that of KS Steel.
Sword of the Stranger (Japanese: ストレンヂア 無皇刃譚 , Hepburn: Sutorenjia Mukōhadan , Stranger Mukōhadan) is a 2007 Japanese anime film directed by Masahiro Andō and produced by animation studio Bones.
 The film follows Kotaro, a young boy who is hunted by a group of swordsmen from Ming Dynasty China for mysterious reasons.
 Among the group is a fearsome Western fighter named Luo-Lang, whose only desire is to find a worthy opponent.
 Kotaro and his dog meet "Nanashi", a nameless ronin who is haunted by memories of his past which have led him to avoid drawing his sword ever again.
 When the Ming clash with a Sengoku-era feudal lord, a proud general, and monks torn between faith and survival, the reason behind the Ming group's pursuit tests the bond between Kotaro and Nanashi.
Kotaro Azuse (東瀬 耕太郎 , "Azuse Kotaro" , born May 6, 1967) was a Japanese Nippon Professional Baseball pitcher.
 He played with the Yokohama Taiyo Whales.
CVCC is a trademark by the Honda Motor Company for an engine with reduced automotive emissions, which stood for "Compound Vortex Controlled Combustion".
 The first mention of Honda developed CVCC technology was done by Mr. Soichiro Honda February 12, 1971, at the Federation of Economic Organizations Hall in Otemachi, Chiyoda-ku, Tokyo.
 Honda's engineers at the time, Mr. Date conferred with Mr. Yagi and Mr. Nakagawa about the possibility of creating lean combustion via a prechamber, which some diesel engines utilized.
 The first engine to be installed with the CVCC approach for testing was the single-cylinder, 300 cc Honda EA engine used in the Honda N600 hatchback in January 1970.
 This technology allowed Honda's cars to meet Japanese and United States emission standards in the 1970s without a catalytic converter.
 A type of stratified charge engine, it first appeared on the 1975 "ED1" engine.
 As emission laws advanced and required more stringent admissible levels, Honda abandoned the CVCC method and introduced PGM-FI, or Programmed Fuel Injection on all Honda vehicles.
 Some vehicles in Japan had a combination of electronically controlled carburetors, called PGM-Carb on specific, transitional Honda D, E and ZC engines.
Kotaro Fujikawa (藤川 虎太朗 , Fujikawa Kotaro , born July 24, 1998) is a Japanese football player.
 He plays for Júbilo Iwata.
Hantaro Nagaoka (長岡 半太郎 , Nagaoka Hantarō , August 19, 1865 – December 11, 1950) was a Japanese physicist and a pioneer of Japanese physics during the Meiji period.
Issac (Issaku) Koga was born on December 5, 1899 in Tashiro Village (now Tosu) in Saga Prefecture, Japan, the eldest of 7 children.
 In July 1920, at the age of 20 he started to study at the Department of Electrical Engineering of Tokyo Imperial University (later renamed University of Tokyo).
 After graduation in August 1925, he moved to the new Tokyo City Electrical Institute, which was established to develop and promote radio broadcasting technology under the directorship of Kujirai Kotaro, a pioneer of research and teaching of radio science.
 Initially an engineer, he became an assistant professor in 1929.
 Under the guidance of Prof. Kotaro he studied crystal oscillators, forming the basis of his PhD thesis, completed in April 1930, entitled "Characteristics of the crystal oscillator".
 This work included making the first quartz tuning forks in 1927.
 In 1929 he became an associate professor of Tokyo Institute of Technology and professor in 1939.
 He became a professor emeritus of Tokyo Institute of Technology in 1961.
 In 1944, he worked as a concurrent professor at University of Tokyo and later became a professor emeritus.
Kotaro Yamazaki (山崎 光太郎 , Yamazaki Kotaro , born October 19, 1978) is a former Japanese football player.
This Honda Today was a "kei car" (minivehicle) produced by the Japanese automaker Honda beginning in 1985.
 It was replaced by the Honda Life in 1998.
 Honda's smallest car being produced at the time was the Honda City, which was a supermini and it had an engine larger than "kei" car legislation allowed.
 The Today represented a re-entry into "kei" car production.
 Honda had abandoned "kei" passenger cars in 1975, choosing to manufacture the Honda Acty kei truck, and the Honda Street microvan for that segment.
 Previously, Honda's smallest car was the Honda Civic, followed by the smaller Honda City in 1981.
Kotaro Honda (本多 光太郎, "Honda Kōtarō", born on February 23, 1870 in Okazaki, Aichi Prefecture – February 12, 1954) was a Japanese scientist and inventor.
 He invented KS steel (initials from Kichiei Sumitomo), which is a type of magnetic resistant steel that is three times more resistant than tungsten steel.
 He later improved upon the steel, creating NKS steel.
 The NKS steel was mentioned by Taiichi Ohno in his book, as being one of the Japanese materials development results after the Second world war.
 He was awarded the Culture Award and the Big Asahi Ribbon of the First Class.
 He was taught by the famous Japanese physicist Hantaro Nagaoka at the University of Tokyo.
 He was one of the first persons to be awarded the Order of Culture when it was established in 1937, being conferred with the honor in 1951.
 He was posthumously awarded the Grand Cordon of the Order of the Rising Sun.
 He participated in establishing the (千葉工業大学, "Chiba Institute of Technology") from 1940.