Clean energy transitions and critical minerals have been highly interlinked since the emergence of criticality studies in the last 15-20 years. Many of the critical minerals are key to providing functionality in clean energy technologies, even if some of the demand for these minerals is not dominated by the energy sector itself. at the same time, most of the critical minerals assessment methods do not explicitly consider the local environment, economy or social implications (and subsequent risks). 'Just transitions' work has also been expanding across a similar time period, highlighting the need to consider the community and social implications of clean energy transitions. The combination of considering critical minerals (including how we assess criticality) and the justice of energy-resource transitions is thus an area that needs increasing attention. The Indo-Pacific is a region with highly varied development levels, countries across the supply chain of minerals, highly dependent on fossil fuels for energy and income, but likewise committed to energy transition. In this context, it is an ideal region to consider just resource-energy transitions for a variety of technologies. In this study, we focus on hydrogen supply chains, which are receiving enhanced attention (again) to support clean energy transitions. The study examines the implications of hydrogen transitions across multiple countries in the region, considering firstly the available resource capacity for critical minerals to enable these technological shifts, and subsequently the impacts of a transition away from fossil fuels in the region.