It really depends on what you mean by everyday conversation. Every day in English I have conversations I couldn't possibly have in Japanese (politics, social issues, etc.), I also have conversations I can easily have in Japanese.
Superficial requests which revolved around my own wants and needs were easily acquired. With the couple of months of once per week lessons I took before going to Japan I had enough to get around. Food, drink, asking simple questions about things (price, "what is this called?", etc), asking simple directions, greetings, "nice weather, isn't it?" interactions, etc.