Hideki Shirakawa

Hideki Shirakawa was born in Tokyo on 20 August 1936, the third child of Hatsutarou Shirakawa, a medical doctor, and Fuyuno Shirakawa, the daughter of a Buddhist temple chief priest. Much of his childhood was spent in Takayama, where he collected insects and plants and built radios. As a junior-high student he wrote that he wanted to research plastics useful for ordinary people.

He entered the Tokyo Institute of Technology in April 1957, graduated from the Department of Chemical Engineering in March 1961, and received his Doctor of Engineering in March 1966. The same year he married Chiyoko Shibuya and became a research associate.

As a research associate Shirakawa set out to clarify how Ziegler-Natta catalysts polymerise acetylene. In autumn 1967 a visiting researcher accidentally used about a thousand times too much catalyst. Instead of the usual black powder, a silvery film of polyacetylene formed. Shirakawa traced the mistake, controlled the film, and showed it was made of tangled microfibres.

Alan MacDiarmid noticed the film. In September 1976 Shirakawa joined MacDiarmid and Alan Heeger at the University of Pennsylvania. On 23 November 1976, doping polyacetylene with bromine jumped its conductivity about ten million times. Their 1977 paper announced electrically conducting organic polymers, work that underpins materials later used across batteries, displays and flexible electronics.

Shirakawa moved to the University of Tsukuba in 1979, became full professor in 1982, and later developed oriented and helical polyacetylene films using liquid-crystal solvents. He chaired the Master's School in Sciences and Engineering (1991 to 1993) and served as Provost of the 3rd Cluster of Colleges (1994 to 1997). He retired in March 2000 as Professor Emeritus.

In 2000 he shared the Nobel Prize in Chemistry with Alan Heeger and Alan MacDiarmid "for the discovery and development of conductive polymers." The same year Japan awarded him the Order of Culture and Person of Cultural Merit. He was elected to the Japan Academy in December 2001 and later named Professor Emeritus at Zhejiang University. In June 2025 he delivered a special lecture at Science Tokyo on serendipity and the prepared mind.

Hideki Shirakawa died on 24 August 2026 at a hospital in Yokohama, aged 90. The University of Tsukuba confirmed his death. Japanese press reported metastatic liver tumour and cancer of unknown primary; the university did not state a cause publicly. Funeral arrangements were private, with his wife Chiyoko as chief mourner. He is survived by Chiyoko and their two sons, Chihiro and Yasuki.

Shirakawa married Chiyoko Shibuya in 1966, the same year he received his Doctor of Engineering. They had two sons, Chihiro and Yasuki. After retirement he lived in the Yokohama area; Japanese press photographed him at his Yokohama home around the Nobel year, and he died in a Yokohama hospital in 2026. Chiyoko was named chief mourner at the private family funeral.

As a child in Takayama he collected insects and plants and built radios. He later wrote that horticulture and electronics had competed with polymer chemistry as early university interests, before he committed to plastics. In later teaching he returned often to curiosity, observation, and the habit of asking why when something unexpected happens.

Sources: Nobel Prize biographical essay; Jiji; Japan Times.

Shirakawa's public philosophy of science was practical and modest. In his Nobel biographical essay he recalled a junior-high composition about wanting to research plastics useful for ordinary people, a line Japanese newspapers reprinted after the 2000 prize. He framed the silvery polyacetylene film as something nature had prepared when catalyst solubility, polymer insolubility, and fibre morphology lined up.

He treated accident as a starting point, not an ending. The 1967 catalyst mistake mattered because he and colleagues traced the conditions and turned a ragged film into a reproducible material. In his 2025 Science Tokyo lecture, titled around serendipity and a prepared mind, he stressed exchange across fields, the value of broad education, and not missing accidental discoveries but investigating their causes.

He also emphasised careful observation: seeing things as they are as a basic skill for chemistry and for science generally (widely quoted Japanese remarks attributed to him after the Nobel).

Sources: Nobel biographical; Science Tokyo 2025 lecture; Japanese press quote collections.

The 2000 Nobel Prize citation was for the discovery and development of conductive polymers. The work helped overturn the assumption that plastics cannot carry electricity like metals. Doped polyacetylene and later conducting polymers fed into research on polymer batteries, light-emitting devices, flexible electronics, and related materials that became part of modern IT hardware.

University of Tsukuba notes that applications spread toward light-emitting polymer diodes, new colour screens, and polymer batteries, with longer-term hopes for plastic and molecular electronics. Japanese obituaries linked the lineage to materials used in mobile devices and touch interfaces.

Institutionally, Wikipedia and Japanese coverage note he was the first Japanese Nobel laureate who did not graduate from one of the National Seven Universities, and the second Japanese chemistry Nobel laureate. That path (Tokyo Institute of Technology, then Tsukuba) became part of how his career is told to students.

Sources: Nobel citation; University of Tsukuba profile; AP / Japan Times / Asahi obituaries; Wikipedia.

Documented honours include:

• 1983: Award of the Society of Polymer Science, Japan (for FY 1982 research on polyacetylene)
• 2000: SPSJ Award for Outstanding Achievement in Polymer Science and Technology (also listed in his Nobel bio as Award for Distinguished Service in Advancement of Polymer Science, May 2000)
• 2000: Nobel Prize in Chemistry (shared with Alan J. Heeger and Alan G. MacDiarmid)
• 2000: Order of Culture; Person of Cultural Merit
• 2000: Professor Emeritus, University of Tsukuba
• 2001: Special Award of the Chemical Society of Japan
• 2001: Member of the Japan Academy
• 2006: Professor Emeritus, Zhejiang University

Academic leadership roles at Tsukuba included Chair of the Master's School in Sciences and Engineering (April 1991 to March 1993) and Provost of the 3rd Cluster of Colleges (April 1994 to March 1997).

Sources: University of Tsukuba; Nobel biographical; Wikipedia awards list.

Shirakawa's own Nobel Lecture and biographical essay are the primary long-form accounts in English. The Nobel Foundation also published a joint interview with Heeger, MacDiarmid and Shirakawa (December 2000), available as video on the Nobel Prize YouTube channel.

In Japan he was a recurring guest lecturer for Science Tokyo's undergraduate course on the frontiers of science and technology; a 2025 special lecture on serendipity and the prepared mind was released on the university's official YouTube channel in digest and full forms.

Popular explainers and news packages (including TBS NEWS DIG and other Japanese outlets) retell the accidental film and doping story for general audiences. Scholarly history of science articles (for example in Substantia) revisit the 1967 polyacetylene-film episode and credit debates; those are academic, not entertainment documentaries.

No major narrative feature film about his life was verified for this pack. Prefer linking primary Nobel and university media over secondary dramatizations.

Sources: nobelprize.org; Nobel Prize YouTube; Science Tokyo; Substantia historiography.

The main documented dispute is historical credit for the 1967 polyacetylene film, not a personal scandal. Visiting Korean scientist Hyung Chick Pyun carried out the unusual catalyst run that first produced metallic-lustre film at Tokyo Institute of Technology. Later accounts disagree on how much was accident, instruction error, or unsupervised experiment, and on how credit should have been shared.

After the 2000 Nobel announcement, Korean press pressed why Pyun was not a co-laureate. Shirakawa thanked Pyun in his Nobel Lecture acknowledgments for encountering the film discovery by fortuitous error, while later writing that Pyun's contribution to the scientific understanding was minimal and that the Nobel recognised the later doped conducting-polymer work with Heeger and MacDiarmid (1970s), not film formation alone. Historians such as Seth C. Rasmussen have published Pyun's version and Shirakawa's responses in Substantia; the debate remains part of the scholarly record.

No criminal or unrelated personal controversy was found in major English or Japanese obituaries for this pack.

Sources: Shirakawa Nobel Lecture acknowledgments; Shirakawa response in Substantia; Rasmussen articles in Substantia; secondary summaries in history-of-science literature.