Takaki Oshima

Takaki Oshima is a United Kingdom-based independent researcher working across quantitative trading, creative coding, and AI, according to his personal homepage. His homepage states that he previously worked at Google and as an HFT quant, and later co-founded a startup where he researched and built decentralized systems. A LinkedIn index record lists a Quantitative Researcher role at Jump Trading and education at the University of Cambridge. He represented the United Kingdom at the IMO 2007, earning an Honourable Mention with 7 points. He was a founder of Luna Research Ltd, incorporated in London in May 2018.

Notes8

• Quant employment verification: CONFIRMED. Takaki Oshima's own homepage states 'In the past I worked at Google and as an HFT quant. Later, I cofounded a startup where I researched and built decentralized systems' (takakioshima.com), which is a first-person claim of past professional high-frequency-trading quant employment (identity corroborated: same site is linked from his GitHub profile github.com/toshima and matches his LinkedIn handle). The specific employer 'Jump Trading' and the title 'Quantitative Researcher' (2013-2016) rest on a LinkedIn index record and remain index-only, not independently confirmed; Jump Trading is a proprietary high-frequency trading firm, so the employer classification as quantitative finance is correct. No dedicated internship at a quant firm was found in public sources.Apr 2026
• Homepage self-describes as an independent researcher across quantitative trading, creative coding and AI, and states he previously worked at Google and as an HFT quant, later cofounding a startup building decentralized systems - the strongest first-person account of his career arc available.Apr 2026
• Founder of Luna Research Ltd (company no. 11380526), incorporated in London 24 May 2018, SIC 62090 'Other information technology service activities', registered office 1 Fore Street Avenue, London EC2Y 9DT - matches the homepage's 'cofounded a startup ... decentralized systems'.May 2018
• LinkedIn index record lists 'Quantitative Researcher, Jump Trading' with education University of Cambridge and location United Kingdom; this is an index-only claim and does not independently confirm the employer relationship.
• IMO 2007 UK team member representing the United Kingdom; scored 7 points (P4 only) and received an Honourable Mention, ranked 402 overall at 22.9%.Jul 2007
• Attended Westminster School before university; the UKMT IMO squad selection news (2 April 2007) lists 'Takaki Oshima, Westminster School' after a training camp at Trinity College, Cambridge.Apr 2007
• GitHub account 'toshima' (Takaki Oshima) links personal site tkshm.com and holds ~17 public repositories, including a Python client for generals.io; carries Arctic Code Vault Contributor and Pull Shark achievements.
• X/Twitter handle @takakioshima is given on his homepage as the best contact channel.Apr 2026
• Name appears in the published solution credits of multiple Jane Street puzzles (e.g. Robot Archery, Subtiles 2) - a signal of engagement with Jane Street's public puzzle series, not evidence of employment there.