Yukiyasu Kamitani | 神谷之康 Neuroscientist and brain decoder http://kamitani-lab.ist.i.kyoto-u.ac.jp http://youtube.com/@ATRDNI/videos https://twitter.com/ykamithttps://bsky.app/profile/ykamit.bsky.socialhttps://bsky.app/profile/ykamit.bsky.social/post/3mrquq34wrc2cNew preprint. Taking spurious reconstruction as our entry point, and using the framework of C (looking convincing) and T (the target being achieved) from Ken Shirakawa's doctoral thesis, we give a formal account of how phantom evidence arises in the age of generative AI.　　arxiv.org/abs/2607.25991 https://arxiv.org/abs/2607.2599129 Jul 2026 02:25 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3mrquq34wrc2chttps://bsky.app/profile/ykamit.bsky.social/post/3mlbgah2vzs25“If pizza was never shown during training, brain decoding cannot reconstruct pizza.” This is a misconception. Since Miyawaki et al. (2008), reconstructing unseen stimuli has been a core requirement of reconstruction, distinct from classification or retrieval.07 May 2026 14:25 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3mlbgah2vzs25https://bsky.app/profile/ykamit.bsky.social/post/3m5luf35ndk2garxiv.org/abs/2511.07960 https://arxiv.org/abs/2511.0796014 Nov 2025 14:12 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3m5luf35ndk2ghttps://bsky.app/profile/ykamit.bsky.social/post/3m3eb4rjtxk2uSfN 2025 satellite Symposium DATES: Thursday 13 November ~ Friday 14 November 2025 (cf. SfN2025; November 15~19) VENUE: CORTEZ HILL Room (3rd floor), MANCHESTER GRAND HYATT SAN DIEGO 1Market Place, San Diego CA 92101, USA. https://www.jst.go.jp/kisoken/crest/research/activity/1111117/SfN2025satellite.html17 Oct 2025 02:48 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3m3eb4rjtxk2uhttps://bsky.app/profile/ykamit.bsky.social/post/3m3cwdnivfs2aNew preprint from our lab led by Onoo-san. We propose readout representation, defining neural codes by what can be recovered, not what caused them. Inputs remain recoverable from distant features, revealing expansive, redundant codes that align neural activation with meaning arxiv.org/abs/2510.1222816 Oct 2025 14:03 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3m3cwdnivfs2ahttps://bsky.app/profile/ykamit.bsky.social/post/3lzimzyk66c2tNew preprint from our lab, led by Otsuka-san. In brain–AI alignment, linear transformations are common—but when features ≫ samples, outputs collapse onto the training set, breaking zero-shot predictions. We mathematically show how data and model sparsity can help avoid this. arxiv.org/abs/2509.15832 https://arxiv.org/abs/2509.1583223 Sep 2025 09:42 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3lzimzyk66c2thttps://bsky.app/profile/ykamit.bsky.social/post/3lz3gi6c2hc2gOur article is out in Annual Review of Vision Science: “Visual Image Reconstruction from Brain Activity via Latent Representation” We trace the path from early brain decoding to modern NeuroAI, highlight progress & pitfalls, and discuss future directions https://www.annualreviews.org/content/journals/10.1146/annurev-vision-110423-02361618 Sep 2025 03:40 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3lz3gi6c2hc2ghttps://bsky.app/profile/ykamit.bsky.social/post/3lupdmovrec22Can we hear what's inside your head? 🧠→🎶 Our new paper, led by Jong-Yun Park, presents an AI-based method for reconstructing arbitrary natural sounds directly from a person's brain activity measured with fMRI. https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.300329324 Jul 2025 10:36 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3lupdmovrec22https://bsky.app/profile/ykamit.bsky.social/post/3lp57j63zh223Our overview of visual image reconstruction from brain activity is in press at Annual Review of Vision Science. We explore its foundations, how the field evolved, where it went astray—and how to set it right arxiv.org/abs/2505.08429 https://arxiv.org/abs/2505.0842914 May 2025 14:28 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3lp57j63zh223https://bsky.app/profile/ykamit.bsky.social/post/3lomqviox7k2eUpdated preprint, now in press at Neural Networks arxiv.org/abs/2405.10078 https://arxiv.org/abs/2405.1007808 May 2025 01:24 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3lomqviox7k2ehttps://bsky.app/profile/ykamit.bsky.social/post/3lbb7kp74ak2tBrain-to-AI and Brain-to-Brain Functional Alignments https://speakerdeck.com/ykamit/brain-to-ai-and-brain-to-brain-functional-alignments19 Nov 2024 00:47 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3lbb7kp74ak2thttps://bsky.app/profile/ykamit.bsky.social/post/3ktbmtvjqus2mNew preprint, led by Ken Shirakawa. Using inappropriate generative AI methods and naturalistic data, seemingly realistic but spurious visual image reconstruction can be generated from brain data (even from random data). We describe it and formulate how it occurs arxiv.org/abs/2405.10078 https://arxiv.org/abs/2405.1007825 May 2024 00:52 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3ktbmtvjqus2mhttps://bsky.app/profile/ykamit.bsky.social/post/3krj54fj3j22kWhile investigating the issues of questionable brain decoding and reconstruction (osf.io/nmfc5/#!), Misato Tanaka from my lab found that the seminal paper by Nishimoto, Naselaris, Benjamini, Yu, & Gallant (2011) appears to use highly similar stimuli across both training and test sets. ...02 May 2024 13:42 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3krj54fj3j22khttps://bsky.app/profile/ykamit.bsky.social/post/3ko2ik7bcpo2uNew preprint from our lab! Led by Wang-san, this work introduces a content-loss-based functional alignment of brain data, which does not require shared stimuli between subjects/datasets; greatly expanding the potential of data reuse arxiv.org/abs/2403.1151719 Mar 2024 13:41 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3ko2ik7bcpo2uhttps://bsky.app/profile/ykamit.bsky.social/post/3klk2m5kb2u2jExhibition of Pierre Huyghe "Liminal" From 17 March 2024 to 24 November 2024 At Punta della Dogana, Venice, Italy https://www.pinaultcollection.com/palazzograssi/en/pierre-huyghe-liminal We provided brain-decoded images and moves for some of the works16 Feb 2024 13:58 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3klk2m5kb2u2jhttps://bsky.app/profile/ykamit.bsky.social/post/3kljzyunl2526Exhibition of Mogens Jacobsen"Restruktion" at Ringsted Gallery, Denmark, where one of the works was created in collaboration with my lab https://kunsten.nu/artguide/calendar/mogens-jacobsen-restruktion-omsorg-og-maskiner/16 Feb 2024 13:47 +0000at://did:plc:sdy56amz44yz2msagslrffif/app.bsky.feed.post/3kljzyunl2526