The reign of Panembahan Seda ing Krapyak ("c." 1601–1613), the son of Senapati, was dominated by further warfare, especially against powerful Surabaya, already a major centre in East Java. The first contact between Mataram and the Dutch East India Company (VOC) occurred under Krapyak. Dutch activities at the time were limited to trading from limited coastal settlements, so their interactions with the inland Mataram kingdom were limited, although they did form an alliance against Surabaya in 1613. Krapyak died that year.