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Hikari Otsuka

3 papers hereh-index 212 citations14 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • first author2
  • middle author1

Across the 3 of 3 papers where every author was matched, so the position is known.

fields
  • cs.LG2
  • cs.RO1

identity via Semantic Scholar / OpenAlex

collaborators

3 papers

cs.RO2026

ActionCache: Training-Free Acceleration for Vision-Language-Action Models with Action Caching and Refinement

Ryuji Oi, Hikari Otsuka, Kosuke Matsushima +4

Vision-Language-Action (VLA) models have emerged as a promising approach for generalizable robotic manipulations. In particular, flow-matching-based VLA models have shown remarkabl…

cs.LG2025

The Strong Lottery Ticket Hypothesis for Multi-Head Attention Mechanisms

Hikari Otsuka, Daiki Chijiwa, Yasuyuki Okoshi +3

The strong lottery ticket hypothesis (SLTH) conjectures that high-performing subnetworks, called strong lottery tickets (SLTs), are hidden in randomly initialized neural networks.…

cs.LG2025

Partially Frozen Random Networks Contain Compact Strong Lottery Tickets

Hikari Otsuka, Daiki Chijiwa, Ángel López García-Arias +6

Randomly initialized dense networks contain subnetworks that achieve high accuracy without weight learning--strong lottery tickets (SLTs). Recently, Gadhikar et al. (2023) demonstr…

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