This paper will analyze the function of final particle "yo", and factors that may affect the use of "yo" in order to avoid FTAs if there is any. The data used in this paper is a transcription of a 10-minute unscripted excerpt from a Japanese comedy variety show called "Shabekuri 007". The excerpt was first aired on April 20th, 2020, under quarantine due to the COVID-19 situation. Final particle, as an important aspect in Japanese language, allows the speaker to convey their attitudes or judgments on the conversation. One of the most common final particles in Japanese is "yo". The results show that when the source of information is from the speaker, "yo" is used to confirm that addressee receives the information and when the source is the addressee, "yo" is usually used to emphasize on different opinions. The frequency of its usage largely depends on the relationship between speakers and level of formality of the conversation. As mentioned, final particles are an important aspect of Japanese conversation, yet often underestimated in Japanese classes. The findings of the paper will show how final particle "yo" is used in real situation, thus help Japanese language learners to use it properly to make their spoken Japanese sounds more natural.