When was the last time the EUR-JPY pair was over 150.00?

The basic theories underlying the US dollar to euro exchange rate
Law of One Price: In competitive markets, free of transportation cost barriers
to trade, identical products sold in different countries must sell at the same
price when the prices are stated in terms of the same currency.
Interest rate effects: If capital is allowed to flow freely, exchange rates
become stable at a point where equality of interest is established.
The dual forces of supply and demand
These two reciprocal forces determine euro vs. US dollar exchange rates.
Various factors affect these two forces, which in turn affect the exchange
rates:
The business environment: Positive indications (in terms of government
policy, competitive advantages, market size, etc.) increase the demand for
the currency, as more and more enterprises want to invest in its place of
origin.
Stock market: The major stock indices also have a correlation with the
currency rates, providing a daily read of the mood of the business
environment.
Political factors: All exchange rates are susceptible to political instability and
anticipation about new governments