The question asks which individual was not conferred the Padma Awards as approved by the President of India in 2015. Let's evaluate the given options one by one:
- Kharag Singh Valdiya: A well-known geologist from India, recognized for his scientific work, was indeed among the awardees in 2015.
- Mohammad Yusuf Khan: Popularly known by his stage name "Dilip Kumar," was conferred the Padma Vibhushan in 2015 for his contribution to Indian cinema.
- Lakshmi Gopala Naidu: There is no record of Lakshmi Gopala Naidu being awarded the Padma Awards in 2015.
- Saichiro Misumi: A Japanese national awarded the Padma Shri in 2015 for his contributions in the field of public affairs.
Given the options, Lakshmi Gopala Naidu was not one of the recipients. Thus, the correct answer is:
Lakshmi Gopala Naidu