In Oct. 2013, Toyota published a paper in the peer-reviewed Japanese Journal of Applied Physics which confirmed important experimental results that Mitsubishi Heavy Industries had first published in 2002. MHI had claimed transmutation of Cesium into Praseodymium via the forced diffusion of Deuterium gas through a thin-film heterostructure containing elemental Palladium using a permeation method pioneered by Mitsubishi; it is capable of triggering nuclear reactions in condensed matter systems under modest temperatures and pressures.
Importantly, all of this experimental data is predicted and fully explained by the peer-reviewed Widom-Larsen theory of low energy nuclear reactions (LENRs).
While the Mitsubishi permeation method is not a suitable embodiment for commercial power generation systems based on LENRs, it has proven to be an excellent laboratory tool for demonstrating that nuclear transmutations can be triggered at will without the use of huge macroscopic temperatures and pressures. In other words, aging stars, supernovae, fission reactors, and thermonuclear explosions are not necessarily required; nucleosynthesis can occur in tabletop experiments that surprisingly do not have or need any radiation shielding.
Toyota's experimental confirmation of Mitsubishi Heavy Industries’ (MHI) neutron-catalyzed LENR-based transmutation method also effectively provided a proof-of-concept for disposal of rather nasty radioactive Cesium (Cs-137) commonly found in nuclear fission reactor wastes into other heavier, non-radioactive stable elements/isotopes using MHI’s permeation process. In principle, a variant of MHI's LENR method with larger neutron fluxes would be extremely flexible and should work on any other type of radioactive isotope that can capture low energy neutrons, e.g., very dangerous Strontium-90, many long-lived transuranics such as Neptunium (please see http://wwwndc.jaea.go.jp/nds/proceedings/2004/harada_h.pdf ), etc..
Lastly, at an American Nuclear Society meeting held in November 2012, Yasuhiro Iwamura of Mitsubishi revealed the Toyota Motor Company itself had recently become involved in LENR R&D, along with other large Japanese companies that he declined to name publicly. Given Japanese companies well known excellence at long-term strategic thinking, it would not be surprising if their ongoing LENR R&D programs aim to ultimately replace the internal combustion engine.