I have published three works so far from my latest research on the Yavanajātaka. The two works in 2014/2013 replace the 2013 HSSA article:

•”The ‘oldest Indo-Greek text in Sanskrit’ revisited – Additional Readings from the Newly Discovered Manuscript of the Yavanajātaka.” Journal of Indian and Buddhist Studies印度學佛教學研究62, No.3 (2014): 1101-1105.
•”The Last Chapter of Sphujidhvaja’s Yavanajātaka critically edited with notes”. SCIAMVS 14 (2013): 59-148.
•”The Date and Nature of Sphujidhvaja’s Yavanajātaka reconsidered in the light of some newly discovered materials.” History of Science in South Asia 1 (2013): 1-20.

I will present another paper on the Yavanajātaka titled “A new edition of the Yavanajātaka based on the newly discovered manuscripts” at the upcoming 16th World Sanskrit Conference (Silpakorn University, Bangkok, Thailand. Jun 28 – Jul 2, 2015). In this paper, I will discussion the entire work as a whole and consolidate all the findings so far on this important document.

At the present, Prof. Yano Michio and myself are about to complete our 3-years reading of Utpala’s commentary on Varāhamihira’s Bṛhajjātaka. We plan to prepared an annotated translation of the BJ in Japanese. After this, we may start working on Mīnarāja’s Vṛddhayavanajātaka.

Just today I found an old thread in Skyskript discussing my 2013 work on the YJ: http://skyscript.co.uk/forums/viewtopic.php?t=7500