In Japanese, you choose which of them to use ... "Me" is WATASHI. You use the particle, NI, to indicate the receiver. So, "Kenta gives a photograph to me" is KENTA WA WATASHI NI SHASHIN O KUREMASU.

NI also indicates a specific point in time, such as a date or clock time. Suppose, for example, we say "Anna comes at ten o'clock" in Japanese. Ten o'clock is JÛJI. "To come" is KIMASU.