Haiti was probably worse in terms of the earthquake aspect of this disaster.
This tsunami looks to be on par with the Indonesian tsunami in terms of devastation [despite being a good 50 feet smaller at it's peak], due to the degree of population and infrastructure in areas hit.
However, Japan has at it's advantage the fact that it is a highly developed nation, compared to Haiti and Indonesia, which will enable more efficacious rescue efforts.
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For comparison, the 1498 Japan tsunami was 56 feet high at it's peak, and killed an estimated 31,000 people.