Sep. 02, 2025

Niterra Acquires DENSO's Spark Plug Business, etc.-No Immediate Impact on Rating; JCR Will Monitor Synergistic Effects and Impact on Earnings and Financials

Feb. 21, 2025

JCR Affirmed AA-/Stable and J-1+ on Niterra

Nov. 26, 2024

Niterra Acquires Toshiba Materials—JCR will Watch for Synergy Effects and Impact on Earnings and Financials

Jan. 22, 2024

JCR Affirmed AA-/Stable and J-1+ on Niterra

Jul. 11, 2023

Niterra Starts Discussions and Considerations Regarding Acquisition of DENSO’s Spark Plug and Other Businesses - JCR Will Watch for Progress of Discussions and Impact on Niterra’s Earnings and Financials

Feb. 28, 2023

JCR Assigned Preliminary AA- Rating to Shelf Registration of NGK SPARK PLUG

Dec. 29, 2022

JCR Affirmed AA-/Stable and J-1+ on NGK SPARK PLUG

Feb. 09, 2022

JCR Affirmed AA-/Stable and J-1+ on NGK SPARK PLUG

Jan. 19, 2021

JCR Affirmed AA-/Stable, AA- and J-1+ on NGK SPARK PLUG

Nov. 02, 2020

JCR Assigned J-1+ Rating to NGK SPARK PLUG