Enable Rosetta support by modifying .kujira/config/config.toml as follows.
###############################################################################
### Rosetta Configuration ###
###############################################################################
[rosetta]
# Enable defines if the Rosetta API server should be enabled.
enable = true
# Address defines the Rosetta API server to listen on.
address = ":8080"
# Network defines the name of the blockchain that will be returned by Rosetta.
blockchain = "kujira"
# Network defines the name of the network that will be returned by Rosetta.
network = "kaiyo-1"
# Retries defines the number of retries when connecting to the node before failing.
retries = 3
# Offline defines if Rosetta server should run in offline mode.
offline = false
# EnableDefaultSuggestedFee defines if the server should suggest fee by default.
# If 'construction/medata' is called without gas limit and gas price,
# suggested fee based on gas-to-suggest and denom-to-suggest will be given.
enable-fee-suggestion = false
# GasToSuggest defines gas limit when calculating the fee
gas-to-suggest = 200000
# DenomToSuggest defines the defult denom for fee suggestion.
# Price must be in minimum-gas-prices.
denom-to-suggest = "ukuji"